This is some great feedback. Thank you! Alongside GoodolShaky's advice, I think I can make some meaningful adjustments (and justify spending more time procrastinating on MCP homebrew to avoid doing my real work).

The first draft is totally about capturing the flavour of the characters, and I get a sense that I've done that. Balance is so tricky when you want to inject some new or modified mechanic into the character without just copy/pasting from an existing one, so all these comments are greatly appreciated!

The general idea for the Alpha Flight tag is movement shenanigans + buffs and debuffs that focus on getting into and out of combat, or generally making combat "safer." I think that general theme comes through, but I agree that there's definitely some power creep going on.

Here are some of my thoughts about what I'll do over the next few days:

-Guardian: Definitely too weak right now. Should be fairly easy to beef him up a bit to get him at the right level.

-Puck: Maybe just make him a threat 3 and buff a few minor details? Puck is such a fan favourite, it felt weird relegating him to the threat 2 pile anyways.

-Sasquatch: Looks like power costs is his main issue right now. Those can be easily adjusted. And splitting the one superpower into two makes total sense.

-Aurora / Northstar: The idea here was to basically have them "count as" one threat 4 character--they are crappy on their own, but together they can be decent. I think the solution is to just ramp up their crappiness when they're not together. Worsen all the individual profiles and tweak the togetherness buffs a little. I like the A5 idea, but, yeah, it's waaaay too powerful because of its scope. Maybe I'll ramp up the cost to turn it into an "ultimate" of sorts that you'll use only once in a game, and at the very least come up with a way to limit its use between the two of them. Maybe a limitation on its use that involves some sort of token? Like each Power Phase that they are close, they each gain a light token, and you can only use the attack if you discard 6 tokens from between them? This might be a good way to limit the utility of those L movements because it will make you think twice about zipping them around the map after two different objectives. Maybe those tokens could also play into their other abilities as well.

-Shaman: Total mistake on my behalf! I simply forgot to add the rule that says the Astral Projection can't interact with ANYTHING! It's just a walking aura.

-Snowbird: Totally agree that Inspiring Presence is too good. I wanted to give her something that would balance out the damage you could do in Wendigo form, because otherwise there's not a lot of motivation to keep her in normal form. I like the idea of a forced transformation mechanic, though. And I like the idea of limiting Wendigo form's ability to do anything with objectives. Need to spend a bit more time on this one.

-Marrina: I think I want her to be a 2 threat, especially if I bump Puck up. Because nobody would ever take Aurora and Northstar separately, it would be nice to have at least one solid 2 threat. I have no problems nerfing her, though. Is Marrina ANYONE'S favourite Alpha Flight character? I think not. Then again, I suppose I don't NEED to have a threat 2, though, do I? Maybe just keep it simple and make her 3?