It depends on how it's implemented. Currently the game is built around working out an optimal skill rotation for yourself, which can get hectic if you're a rotation-heavy class like a Monk in a full party where everyone's button smashing. Even if the skillchain effect is enough to compensate for everyone inevitably having to slow down, if my experience in XI taught me anything, it's that pugs and skillchains don't mix well. End-game pugs are already problematic as it is, if we throw in skillchains too I can imagine at least a few people reenacting the Keyboard Crasher kid.

Not saying it shouldn't be done, but right now the game is kind of built to be unfriendly to these kind of features.