DMines, WC, and SFK arent really faction specific
No but the travel time doesn't seem to be worth it in my eyes if you are of the other faction.

SM - There isnt a key requirement anymore. That sentence needs removed / altered.
Oops, you are right, forgot that

ZF - What changes?
You used to be able to mount up, pull most of the isntance and dismount. Now you will often get dismounted and or hexed. So if you do go there, do it on a boomkin(immune to hex and has some healing, pushback etc) or just take it slow and use bubble/iceblock pvp trinket.

L48-54 - LBRS There are lots of spots to get LOS, then again lots of places to get slaves stuck too.
I think you can just leave your toons at the instance entrance now and still get xp, I did that in ramparts and stockades without a problem, before the changes, I had to move my toons around to keep in roughly a 30 yard range, it seems its either a lot further or instance wide now.

unfortunatly I have all 30 of my chars up to level 60 already so I will only be boosting some friends maybe in the future and won't be testing this :/