toucanbuzz
No rule is inviolate
that means rolling initiative EVERY.SINGLE.ROUND. That is a huge time sink and too much micromanagement.
I'll beg to differ on this point as I've been running (for years now) an adaptation of the "weapon speed" rules in the DMG. Because everyone (that's 4 players + the DM) are deciding (generically) what they're doing simultaneously at the start of the round, we're saving a huge amount of time. We don't have 4 people sitting around waiting while 1 person at a time debates what to do.
(Showing my age her...) Having run AD&D (weapon speed) for 10 years and the d20 system of D&D 3.5, Pathfinder, and D&D for another nearly 15 years, my experience is that declaring actions has been the quickest way to do it. The only issue is to find mechanics that actually make sense and are easy to use.