I don't think that burst windows are as much of a design choice as they are an accommodation. IIRC, raid teams came up with the idea to stack buffs together using certain classes and so others were adjusted to compensate with an aim to dilute the meta and be inclusive. It won't matter how they design classes in that respect, the community will find a way to optimize the new design and it will filter to the masses, whether or not it is technically good for them.