If your beef is really what you're saying in this post, rolling a new class won't help. The clunkiness you complain about is more related to the slower pace of pvp in general due to the 1.5s GCD. I still play WoW, anymore just pvp on my rogue, and server lag affecting positional attacks is the same. Quite often I'll kidney shot someone and stand behind them only to not be able to Ambush or Backstab; then the server catches up and my target warps 10 yards away from me, still stunned but wasting a second or two of shadow dance. Same happens here from my experience; laggy players and positional attacks are not very compatible.
The other complaints you have, the long drop combat timer, getting cc'd, etc... I see your beef. You play a warrior in WoW; since the middle of WotLK, warrior mobility has steadily gone up (even with the nerf to the talent juggernaut after s8). My advice? PvP on a less mobile melee, either a death knight or a rogue, then come to this game and play your operative. Warrior is the most mobile, most difficult to control, melee in WoW: ToR does not have an equivalent with all of those tools to break cc and move around the battlefield
Your play style simply needs to adapt to the lack of tools you have. Right now you aren't used to being in the situations you find your character in. I'm pretty sure that if you like melee, once you adjust to the less mobility you may even find Sith Warrior pvp to be fun (ignoring all of the complaints about being kited endlessly).