Both of these are highly unfair to those of us below lvl 35 and to anybody who does not have the pvp gear set. I have seen this kind of thing send a game to its ruin.
Battleground: the level gap is too big, it needs to be cut down from 30-40 and split into 2 areas, 30-35 and 36-40. while it may not be a problem right now, when we get level 80s the 41-80 area will need to be split as well or you will have people lvl 41 facing whole teams of lvl 80s. Set this up and people can use multiple characters to fight in each zone, maybe institute a way for them to stay in their own zone and to never level out. this would also solve the problem of not getting anything back for gear mentioned a little earlier.
Arena: me and a guildie were in Arena a little bit ago and couldn't help but notice that 90% of our battles were against teams in full pvp gear. again, this could send the game to its ruin. set up a matching system that matches you based on battle rating and by lvl and those of us without pvp gear will actually stand a chance.