I realize I represent only a few opinions by speaking for my friends, but we have played this game a crazy crazy - possibly unhealthy - amount. Our most optimal and "broken" compositions ALWAYS include magic and physical setups. We've tried full magic and full physical parties and it doesn't work as well. I get that this is anecdotal and you'd have to actually trust that I know what I'm talking about - but that won't stop me from trying to convince you.
I think you guys give larian too little credit. There are definitely balance issues remaining (some significant ones) but the dual armor system works well. I think a single armor system takes away strategic elements and as Stabbey put quite well you sacrifice the smoothness of gameplay (when based around resistances).
