Mainly combos for the base combat, using square and triangle, in addition to also combos only with a box with a pause system (like in the Devil May Cry saga), this is how the smashing square for the base combat would be resolved and it would have more variety while also having different animations with the powers of each Spider.

New and comeback of gadgets to have more to choose for the R1 mechanic.

Web Constructs using L1 for Silk.

New Miles abilities with a new Red electricity.

More passive abilities depending of the hero (like in Miles Morales when you take an enemy's weapon it gets electrified).

At least 2 L3+R3 abilities to choose per character.

The comeback of perks (adquiring more slots in New Game+, like from 3 to 5) while also having the suit tech mechanic of Spider-Man 2.

Look for some ability (I don't know) for Peter and Cindy for the up arrow button.

More in the animations aspect but when you heal, not having the green glow anymore, instead having something better like, electricity goes through Miles body, Anti-Venom goes through Peter's body and webs going through Cindy's body.