Its ffxiv combat really so slow and boring?

[MomomiMomi]

Do you understand how things like branching combos (Storms Path/Eye, most of MNK, PLD or damage, the entirety of SAM and DRG) would be screwed up by this?

Don't be deliberately obtuse, they aren't going to make a large change like this optional.

I feel like perhaps you need a greater understanding of melee and tanks at 70, your opinions seem like they're based more in theory than practice.

They aren't. Each finisher is its own combo. Branching combos are not a problem.