My former table of players was full of very different player types. Sometimes, at conventions, I played with people of very distinct styles. I conclude that, short term or long term, a game can look like a potluck and I like that.
Designing for one style is fine. But what about a frozen yogurt game where each player uses a set of light techniques specific to its style ? The planner brings the plans, the actor does the acting, the merchant gets to count copper coins, etc.
What problems will that imply ?
1 I see how some incompatibilities are by nature : character achievement vs flashlight dropping, rules light vs heavy, focus on one theme vs another, what else ?
2 downtime : while a player is doing their thing, do we just watch ?
3 info management cache growth : "we established what character speaks what language but the linguist player is not there and now we have to manage this on top of other things for the benefit of no one."