Btw, I'm not exalted with aldor/scryer hence the lousy shoulder enchant.. I'm working on the rep for sons of hodir though, I hope that will help a bit.
Soon I'll take the T7 gloves too and guess what, there's even less def on those than on my current gloves
You have a parry/stam gem in your chest that could be a defense gem (and give you more avoidance, not less), and an expertise enchant on your bracers that could be +12 defense. A couple of def/stam gems instead of straight stam and you'd be sitting pretty.
You could always use a defense trinket. I have my Scarab of Displacement in my bags to fill the def hole if I ever need it, Dabiri's Enigma is handy in that respect too.
I fear being in the same boat as you once I get upgrades. Right now, I am at 564 Defense, even without any of the Def enchants (+18 STA in most areas). I have even a few more pieces to put enchants on because I got them tonight and am too poor to afford the mats.
I'm hoping that as I swap out upgrades, I can still stay over 540.
Well once I started "raiding" again in wotlk 1 week into the game i was 540 but you have to stack stack the defense gems and enchants. Now I can play around and enjoy the new loot and more hp enchants.
Looking at your gear, you're giving too much importance to EH/Avoidance than to get to the Def cap, switching that 32 stam gem for the 21 def/+5%BV or something like that should put you over the cap and keep your avoidance stats.