>>29681369>>29681101Well, no one would use Choice items anymore for one.
Set-up sweepers would be much more devastating if they come in at the right time.
Dedicated walls and support mons would probably be phased out in favor of bulky attackers, since each Pokemon would have to pull more individual weight.
Moves like Taunt/Torment/Encore/etc that are currently used to force switches would become much more powerful, possibly to the point of overcentralization.
Based on
>>29681235, moves that allow you to switch would become a valuable commodity. Baton Pass teams might actually become the dominant team archetype.
Aside from that, I could see Perish Song and PP stall gimmick teams cropping up.