This is a pretty long list but i’ll give you my feedback
Brutewurst: im kinda torn on whether brutewurst needs a nerf but i can absolutely understand the argument in favour and if i were to nerf brutewurst its pretty much exactly this change i would do (my thoughts were to revert the 300hp buff it originally got before it went 2 range)
Hematic: yes, absolutely this is great.
Heavo 3.0 i have advocated for this change in the past, the meta shifted a bit since the days of 3.0 + gonzo but i can understand why people want this.
Frosty again completely reasonable, ive advocated for a similar change myself.
Sir probes: not got too much experience with him but hes definitely very powerful and this isnt too heavy of a nerf so seems reasonable.
Bluelien: i know its controversial here but i actually think bluelien is balanced. I think hes fallen off a fair bit since his OP days but hes still the best win more tool for whales so he keep ends up being used in the most unfair matches.
Brony: this change doesnt really do much. Id much rather he go to 2 lock or something like that so i can prepare for him
Russell: i have no idea what change russell needs to get, hes such a weird situational yet game changing unit its hard to suggest anything.
Smiley: this is pretty much a reversion to the stupid buff he got in the patch before last which is exactly what i want, that buff made smiley so annoying. Smiley isnt even OP its just toxic for the game, and this change definitely helps with that.
Jaws: jaws is definitely overrated here. Where with bluelien i can understand why bluelien is believed to be OP as he can be insanely annoying in an overlevelled players hands. Jaws even in a top players hands is completely counterable. Get dimensionals, get a high damage team, block him out. If he attacks anything and kills it hes dead. Its not that hard to beat a jaws youve just gotta think.
scritch: i dont even think scritch is that bad just horridly outclassed by gonzo and cupcake, this is a fine change though.
Jackalopes: this is a fine change, though probably wont make them viable it should at least make them more interesting
Electricat: this is a pretty sizeable buff to electricat which while i dont think its good i dont think its the worst of the units on here. I dont think this change would break the game or anything, but its kinda interesting to see how heavy electricat went up compared to some
Eratc: suprised you went after eratic, its not really in that bad of a spot compared to a lot of other units on this list. Its a good counter to quite a few slower mechs.
Staremaster. Way smaller buff than i was expecting. Honestly i would go a bit harder. I wanted it to go up to like 550 damage maybe even more. Staremaster is terrible rn and could easily recieve a pretty sizeable buff.
El espinoso: low experience, i cant really comment.
Le shovel: no no no no PLEASE no. I do not want le shovell going back to one cooldown that was absolutely game ruining. No no no, by far the worst change you have on here. Le shovell rn is fine, its still good. Idk why so many people wanna revert the changes to the displacers that made them actually fair and reasonable units. I was kinda disappointed seeing this cause outside of this particular change, this balance change list has been really good.
Temptress: (you had it going from 300 electric to 350 but temptress actually has 250 electric, its even worse than you thought.) this is quite a big change though temptress definitely needs a very big change. Honestly personally i wanted to buff the ability a lot to lean into it a bit, and leave the base stats mostly alone except for maybe a small health buff.
Volta: i think the better buff would just be give him some more health. His problem is that hes a bit too brittle to survive doing his debuff, a small health buff would work wonders on him.
Primate#9 yes. No complaints.
Bad sushi: i think making him 2 movement with 600 base just makes him easily outclass most 3 keys at the same cost regardless of the ability. I mean this just directly makes him a better babey snakey.
Slammer head. Good change, no complaints.
Edgar allen: i always liked the idea of giving him a 2 turn duration for his buff. Still though this isnt a bad idea.
Blastomatic: an interesting change. While im not the heaviest pro blasto nerf i can see the argument and this certainly makes him less generally bulky in favour of having a better beam
Whiskers. Ive always wanted him to just go to 2 keys. Honestly with this change you could keep the 300 damage hes still way worse than snakey who is already not good.
Gargles: rather than the whole gravedigger thing, literally just make the duration 1 turn. It would be so much more interesting and so much more balanced. Rest of the changes are fine.
Changes i want to add:
Cupcake 300 buff → 250 buff. I dont think a lot of players here realise how absolutely insane cupcake is. He gets slept on all the time when he is easily one of the deadliest units you can have. Easily makes the top 5 units in the game in fact many top players think he is THE current best unit in the game.
Unicorn 950 health → 900. Hes such a strong opener pretty much nothing else competes. Hes like the defacto 2 key you run on every small map, even ones you think he wouldnt work in, even after his nerf.
Buffs:
Id like to see buffs to leshy, fish tank and boo fairy. There are others of course, but those are the key 3 i think are most desperately in need of a buff that this list missed.
Honestly for my opinion of the games balance outside of frosty, unicorn and cupcake nothing is in a heavy need of a nerf rn (though id keep my eyes on quite a few of the units you listed and also hercubees)