I spent entirely too much time in Sky and I'd classify those fights as boring.
I liked it, but a big part of that was that I liked helping out my LS members getting stuff. That and spending time doing stuff with them.

Anyway, I sort of agree with the OP. In many fights, it's more that you fight the mechanics instead of the boss itself. Almost feels like they could remove some bosses and just have you survive x min by staying out of markers on the ground.