BGs part 1:
The 8v8 mode times out if it can't get 8 players per side. So if you're not in US primetime, you can queue for 10-15 minutes while on 7 players and then get booted.
https://forums.elderscrollsonline.com/en/discussion/668161/this-is-the-problem-with-cyrodiil-this-is-now-the-problem-with-8v8-bg#latest

BGs part 2:
The top players in the leaderboard are now all healers. Logically, this means that eventually, top-ranked MMR matches will be between 4 healers and 4 healers
https://forums.elderscrollsonline.com/en/discussion/667906/bg-leaderboard-top-players-are-all-healers#latest

BGs part 3:
The new two-team, four-on-four format means that when there is an imbalance, the matches are extremely one-sided. Usually, matches involve one team getting on top in the first two minutes and the other team wiping over and over again for the next 13 minutes.
https://forums.elderscrollsonline.com/en/discussion/668100/new-bgs-are-awesome-but-need-a-mercy-rule-for-lopsided-matches/p1

Cyrodill:
The new all-purpose repair kits no longer work so every keep now has no walls or doors.
https://forums.elderscrollsonline.com/en/discussion/668108/cyro-repair-kits-dont-work-nothing-can-be-repaired-now-game-breaking-issue#latest

Nightblade Cloak:
Changes to cloak make it way better for overland content..... and bad for everything else.
https://forums.elderscrollsonline.com/en/discussion/668094/return-the-nightblades-cloak-to-its-original-state-because-update-44-is-***#latest

So as far as I can tell, the only thing still working properly from patch 43 is the duelling club in Wayrest?
Or is ToT still working as intended?