I'm a new player as of Cata, so I can't really comment on what it was like before. Just my perception of how it is now.
What are your biggest PVP related quality of life issues? (Things that are an inconvenience but don't significantly affect game play or balance)
Preparation and Timers. I try to get into the arena as quickly as possible to cast Fear Ward, so that it will be up faster than another priest's. There's a few other things like this, things that have short durations, that really should start when the gates open to make it a bit more fair.
Also, I'd like to see a Surrender Option. If I'm healing and there's a DPS and a Healer left in a 2v2 Arena, I'd rather surrender than leave or wait to die. This way I can see the battleground recap panel. Part of 2v2s is just chaining them to grind points, so I'd rather just end quickly. And in some 2v2s that looks like it's going to be 45 minutes long, it would be easier to surrender than leave.
One last thing, and this is for all the Disc Priests out there. COUNT ABSORBS IN HEALING. Sorry for the shouting, but it's annoying to have to explain that I'm not a lame healer, it's that the recap is not showing my true potential.
What Cataclysm BG changes/additions did you like?
I've learned that Rated Battlegrounds are new to Cata. I love the Wargames and Rated Battlegrounds. They're AMAZING. If it wasn't for them, then I wouldn't have gotten involved in PvP other than casually. I'd love to see other battlegrounds expanded to a 10v10 RBG setting.
What Cataclysm General PVP changes/additions did you like?
Conversion from Valor to Conquest, was that a Cata thing? I did like that to help me when I had extra Valor.
What are your top issues with Battlegrounds in Cataclysm? / What are your top issues with General PVP in Cataclysm?
I love my Prot Paladin. I'll still go to Tol Barad with PvE gear and harass enemy healers. I feel my Divine Guardian every 2 minutes can really help. But the Prot Paladin has become the biggest joke of PvP, and I've forced myself to grind out a full Holy PvP set. Vengeance in PvP has been an issue largely with Blood DKs. But it's the Prot Paladin who has suffered the most.
The other issue I have is concerning Achievements. I know some of them are really difficult, but as a healer some of them seem impossible to achieve. I know Capture and Return flags for Twin Peaks seems doable, but generally I'm not anywhere near the flag carrier to return it - I'm healing at a distance. I imagine ranged DPS might have a similar issue.
--Also, when I pick up the Flag, or when someone squishy does to try and get the achievement, there's usually a lot of nasty comments about it on the bg channel. I feel bad when I try for one.
What already announced Mists PVP changes/additions are you most looking forward to? (here is a summary of what is coming: http://us.battle.net/wow/en/forum/topic/3424795794
I'm glad they've looked at some other guys and created bgs that are similar. I'm really glad there's no more driving vehicles, but I'm worried Carts may be similiar. The goblin theme is going to be awesome at the very least.
I hope the new BGs can be RBGs.
Edit, to add a wish-list topic: add a LFR for random bgs. On my server (alliance Sargeras), its not unusual to see trade chat: LFM Low MMR RBGS, 1500+. Seriously, 1500+ is low rated? And on other servers they cant get enough for even onerbg group. Keep the same scoring system, so you're likely to fall in ratings compared to a guild premade, but give people the option please.
I'd love something like this too. In my vision I'd be happier if there was a queue based on Resilience. It would queue for RBG battleground maps, require a minimum resilience to enter, and put together a team of 10 (1 Tank, 3 Healers, 6 DPS) and try to mix classes as best as possible. It would award a once per day of 150 Conquest for a win and honor. It would not be rated, so you won't have to worry about rating adjustments.
This was it's a good stepping stone towards RBGs. It means you have a certain level of Resilience, and you're starting to learn the RBG maps. You may have a longer queue, but I'd be more than willing to wait for that than run around the randomness of a random battleground of mixed skill and gear.