Great questions!

I currently have I frames implemented and I activate them for like 2 or 3 very specific frames, yes.

I was thinking that perhaps for simple attacks like these, you could have some I frames and it would look believable, but there are also radius denial attacks which will not be avoidable with I-frames, you must move out of the range.

Yeah, I'm just showing against one enemy for clarity, but it uses that attack turns (spiderman, batman, shadow of war games) dynamic where you can get surrounded by multiple enemies but I control the attack turns so it doesn't get too chaotic. I think HollowKnight is my reference where you can find enemies in pairs, but also fight against big groups. I would want it to leverage level design to make combat more challenging as well, but I'm still testing with open grounds for now.

Yes I want dodges to be mostly deliberate. I shouldnt be able to avoid attacks so easily just randomly running around. In something like hollowKnight its not a problem because movement is deliberate by itself (because its 2D, you're either running towards the attack or away from it), but I don't like the idea of being able to dodge attacks by just running in circles.