I think you've mentioned some great ideas (I'll weigh in on them), but this forum - contrary to its name
"Suggestions and feedback" - sadly does not seem to be visited frequently by anyone connected to the FH dev team, or at least they only respond to very few threads. A lot of great ideas and useful feedback sink into the void without any reaction from actual devs. This will, too, per my experience.
My opinion is that
there's still a bunch of things that should be sorted out in terms of core gameplay and UI navigation, but instead we're just getting new and new features, letting some problems continue to plague the core game. There's the
processing bug that is still occurring to people today (has been reported by some people including me), the faction war map (including the type of match to play) is still difficult to navigate with keyboard only,
the end match screen being freaking long (even longer now that they've added the imho quite worthless battle pass) and requiring spamming the space key to get through it,
random crashes sometimes punishing the disconnected player,
lagging players having advantage, the Alt key being a horrible and unpredictable way to switch targets (since launch), external attack indicator changing or not showing up in the last moment etc.
I'd love to see this core (mostly main menu related) stuff being ironed out first, but all I see is just "hurray, we've got spectator mode!", new content (which is fine as long as it's not the
only thing being focused on), battle pass and so on. I'd love to see this game improve but it's becoming increasingly hard to keep playing the game because I'm not seeing improvement in areas where there shouldn't be this many bugs in year FOUR of a RELEASED game. For Honor is not a free-to-play early access title.
Onto your stuff now:
While it feels quite bad when you get a cutscene from Centurion while your revenge depletes, this will probably be changed around in his rework. Shug's hug does not always work: if you're attacking, you cannot be grabbed for example. What I find bad is how unpredictable revenge is: sometimes the system still thinks you're in a 2v2 and you're not getting any revenge while being kicked and punched to death, sometimes awarding you almost instant full revenge in the same situation. It was probably once said that this is still being looked at, not much improvement has happened to this for a long time (there's no 1v1 revenge now, at least).
Actually this was a "feature" (or constraint) in the Testing grounds Breach mode recently. I guess they're experimenting with it, but I think this is less of a problem in breach where teams might tend to split up more (someone going for the banner, someone on ballista, other people pushing the ram or someone being on the rampart).
I think the player base is small enough that this would badly hurt matchmaking times. Some people are still in trouble having to wait quite a few minutes only to end up in a match that has both "top 10 ranked champion" and absolute beginner players.
I don't see how that would work out. In which match would you receive this boost? It would just seem like a random disadvantage to enemy players who got dumped into your match with your boosted castle

Also,what if someone doesn't want to play for such advantages, just enjoy a simple, unchanged match? That option would be another division of the player base.