is it it worth to lvl for the axes and whatever you get at 72 i forgot.
Depends on the class. Paladins for example, don't benefit much from it at all besides the axe itself being a decent 'stat stick'. Crusader Strike, but that's not really showing off the weapon's potential. Unlike a Rogue though, whom would greatly benefit from all of the statistics ( Weapon damage in particular )
Nifflevar Bearded Axe - Item - World of Warcraft
And I assume the other piece you mentioned were the Engineering goggles, and my suggestion? If you already leveled out of the arena bracket, might as well grab another potential BiS item ( Especially since it can be reforged. ). I'd be cautious leveling beyond though, I've heard Battlegrounds will not scale your gear after reaching its cap.
( Probably not all of them, but a handful. )
Armored Titanium Goggles - Item - World of Warcraft
Visage Liquification Goggles - Item - World of Warcraft
Charged Titanium Specs - Item - World of Warcraft
Truesight Ice Blinders - Item - World of Warcraft
Unbreakable Healing Amplifiers - Item - World of Warcraft
Greensight Gogs - Item - World of Warcraft
Can you still arena? are you looked on poorly by the community?
No, you can no longer arena above 70 as of patch 5.3. Anything above the intended level will be kicked out of all teams once you pass 70. If you do level, yer stuck to battlegrounds unless you do arena wargames. And frowned upon? Not in my experience, although I'm sure people will be upset if they die abilities such as Avenging Wrath, just like back in Cataclysm it was a pretty large clutch ( Lesser now in comparison. ) So don't be surprised if you get some hate.
Also how are monks, DKs and Ele/Enh Shammies at the level. Also what is most OP
Can't speak for all of them with assurance besides from what I've seen myself.
Monks are decent, they can pull off quite a bit of healing ( Second to disc ). Squishy, but nothing one can adjust to. Very mobile.
DKs, I see all specs. Although I assume most of them have hardly any idea of what they're doing besides trying to get a Death Siphon off, it being a rather hard hitting ability.
Enhancement, no. Elemental is -very- bursty, I've seen plenty of globals all around since 5.3 came live.
Most OP? Humph~
Priest, Paladin, Rogue, Ele Sham, imo