It's a sensible reaction. Every colour gets 2/2s for CC, and every colour gets 2/1s for 1C, with great abilities in both cases. (The Izzet Guildmage cycle canonicalised the 2/2 for CC rule, but every colour gets them all over the place; Ash Zealot is merely the most recent red one.) But only white and green got 2/2s for 1C, until very recently black joined the club with Walking Corpse and then Tavern Swindler.
The extra ability on this card is optional, which means it's always beneficial to have the option. You're never forced to sacrifice a creature, which means it's strictly better to have the galvanize bit there than to not have it. A 1/1 for with "When ~ ETBs, you may sacrifice 8 creatures. If you do, gain 1 life" is strictly better than a vanilla 1/1 for , even if you would virtually never want to use the ability.
So now that this is back into the permissible sizes (1R for 2/1), this is great. Haste is a very strong addition to a 2/1 for 1R, but that's fine on an uncommon; and the galvanize ability will sometimes be pretty handy too.
Oooh, this is interesting. Abusable for your own creatures, or lockdown on your opponent's. Like it.
Interesting variation on Aether Adept. I like the "Exile, then card trigger" mechanic; that could potentially be keyworded (perhaps not on commons).
It's a sensible reaction. Every colour gets 2/2s for CC, and every colour gets 2/1s for 1C, with great abilities in both cases. (The Izzet Guildmage cycle canonicalised the 2/2 for CC rule, but every colour gets them all over the place; Ash Zealot is merely the most recent red one.) But only white and green got 2/2s for 1C, until very recently black joined the club with Walking Corpse and then Tavern Swindler.
The extra ability on this card is optional, which means it's always beneficial to have the option. You're never forced to sacrifice a creature, which means it's strictly better to have the galvanize bit there than to not have it. A 1/1 for
with "When ~ ETBs, you may sacrifice 8 creatures. If you do, gain 1 life" is strictly better than a vanilla 1/1 for 
, even if you would virtually never want to use the ability.
So now that this is back into the permissible sizes (1R for 2/1), this is great. Haste is a very strong addition to a 2/1 for 1R, but that's fine on an uncommon; and the galvanize ability will sometimes be pretty handy too.
Fiiiddly.
So it's a costly unsummon; or optionally a "You can see this coming; but splice onto sorcery/instant: unsummon"; in both cases with an attached 1/1.
Which means.. damn, it's actually probably costed about right; maybe even too cheap. But fiddly to work out when you'd want to use it in what mode.
Mmm... I can get behind that now. Surprising how just a small change makes me feel about a card.
A bolt is still pretty darn good. I guess it's close to Ember Hauler now.
But if things like this exist; why would you ever run Goblin Brigand, let alone Goblin Raider, Goblin Firebug etc.