I was pondering about classes, builds, etc. I remember Larian suggesting that they were in the midst of sort making certain classes more exciting. I think a decent way of doing just that is bringing in teamwork abilites and maybe a teamwork feat.
The idea is to have two or more characters be within a certain distance to access the ability to use.
So first of all, the limitations. The action economy can be simply both a regular action and a bonus action. The distance required could be strict enough to enforce proper positioning especially for spell casters. Not to mention martial defender options and caster concentration checks becoming more meaningful. I was also considering putting a spell slot cost as well, but im not sure if thats necessary overall. Lastly I think the abilites should be tied to the subclasses. So basically you gain access to a new teamwork ability in parallel with gaining a new class feature or an alternative method could be learning them along side asi instead.
Now for the benefits. New aoe's for classes that struggle a bit. More animations and semi cinematic(budget allowing). More options for Melee classes. More synergy between classes as well as more depth.
Examples:
Fighter Battlemaster + Wizard Evocation School = wizard imbues fighters weapon with magic missle and the fighter lunges forward X distance with an attack that can't miss.
Fighter Eldritch Knight + Cleric Light Domain = cleric puts a protection spell on the fighter who then magnifies it to make a resistance bubble to protect allies within range. Similar to the protection bubble from DOS2.
As for the teamwork feat I was think maybe "constitution plus 1 and teamwork range restriction increase to X distance ".
For damage, other math, and possibly saving throws; I think that should be a Larian thing. I just want to put ideas out there to maybe inspire something.