Wow! Really fun with great video game / cinematic moments. What an ending! Wish the single player campaign was just a tad longer. Every playable character, their abilities and their play style are totally delightful. You really feel like thor, iron man, black widow etc...
It feels like a pretty technical fighter, I found it quite difficult on easy. Did not feel like a brainless button masher or like dynasty warriors at all. Required a lot of skill and timing and situational awareness to get through fights.
Have not played any multiplayer yet, just played the campaign, but I'll keep playing because there are so many abilities to unlock still and each one changes your approach or possible approaches.
Gear upgrades we're not noticeable except in a total composite perhaps. I.e. some characters just seemed to die less when their gear was good and upgraded. It's the abilities that are the star.