mhh well i wouldnt say he is bad in pvp
in pvp wardens can:
- lower the healing of the target about 50% with aqua morta
- steal mana per hit from the target (with the actual mana thats pretty nice

)
- has decent healing abilitys (not like summy and cleric ofc but i think 3 place

)
- have 1 skill with a giant dmg gap

(22k-922k last wh for me but already recieved a 1,8 mill one O.o)
- have good kiting and cc abilitys for grp pvp
now to the bad points :/
- pretty squishy a warrior and mage can 2 hit you
- depents on the pet :/ often the pet dies in aoe skills and then you can practically do nothing great anymore
thats my opinion after 2 weeks of warden