Keep the announcements out which you yanked. I know I use RSA across all my toons for all announces, and on my hunter (before I disabled all of Serenity's announces) it would announce shit twice. RSA is a mod specifically just to announce things, and if people want announces, they'll have that addon for it. I also have Clique to right click MD, and other mouseover binds for friendly targets like Master's Call and Roar of Sacrifice and Intervene. That's mainly because I use Grid+Clique for healer alts though, a hunter who solely plays hunter might find that utility helpful.
I agree that the BM 15% chance at focus really needs nothing. As long as the "live" bar can detect and update the influx of focus, that's fine - that's currently how it works for TotH procs on live.
Internal CDs might be nice, if there are serious ones we need to consider. A LnL one, perhaps, I dunno. LnL has had a lot of QoL changes this past expansion, so I don't know that it's particularly necessary. Most of our ICDs are trinket procs otherwise, and I personally track them with TMW.
The +3 from SV SrS ticks is a bit tricky, because it can still tick from SrS on another target even if SrS falls off your current target. I don't see how that could feasibly happen to a progression raider, but it's just an outlying case. Maybe if you're switching targets a lot, you don't get SrS up immediately on the new target due to, idk, focus starvation, but the focus is still incoming because SrS is still up on a previous target.