There are some of the bugs that I find very annoying and gives the opposing team an upper hand in arena. I do suggest you fix these bugs as soon as possible for fair arena matches.
1. Mages can have basically 4 glyphs after you pick your specific armor and replace it with another. Once you change the glyph of armor it basically keeps the same stats.
2. Mirror Image can get players out of stealth and not fair for people that can Invis or Stealth (Rogues,Hunters, Mages Invis and Priest's Fade) Players that abuses this gets an advantage in beating stealthy classes easily.
3. Falling through map in Arenas. Tol'Viron Arena kicks many player of the map once you get CC'ed by the pillars. There are many players that does this on purpose and some does it by accident. This is also another big one.
4. PVE armor in arenas. Its ok to have 1 or 2 PVE items in arena such as rings, neck or back but able to have the full set of PVE in arena is stuped and retarded. Either you remove PVE SET from the server or not allow players to Que with PVE on. Classes such as Balance, Affli, SP and Unholy Death knight are unfair to play with their PVE on because of the bonus they get form set.
5. MMR matching, players that start new character with new gears and que arenas and end up facing FULL retarded PVE Heros is just pathetic.
There are many other bugs and abuses I have to report but once I get some replies on this and some fixes I will post other ones.
And excuse me for the bad English