I understand that PvP level is determined by what research you have done, but is it also based on how many workers you have in your temple of conquest? Is there any way to decrease your pvp level? What particular skills increase your pvp level? The FAQ's are a bit broad in my opinion; a nice sticky about all of the specifics regarding pvp would be extremely useful. Someone got a nice link for me?

Well all research ind ToC and training ground can increase your PvP lv. Also amount of workers in your ToC does.
Raising Br also rasies your PvP lv.
So u can loose some lv by just loosing Br( battel rating btw) or remove workers from your ToC.

everything kini said plus more workers housed(meaning a stronger dreamlord)
also increases your pvp level some

even at the highest levels you can usually only altar your pvp level by 4-5 levels
before pvp 10 you are lucky if you can raise or lower it by 1

So:

Housed workers increase pvp level, battle rating increases pvp level, ALL research in Temple of Conquest, and ALL research in Training Grounds also increases pvp level?

and:

Removing workers from Temple of Conquest (ToC) and lowering Battle Rating (BR) can lower pvp level.

This is what I understand from the above replies. Correct?

jep. not sure on TG upgrade techs and increasing pvp lvl, but apart from that jep.