I'm not an expert ,but because of all those frezzing attacks and the HR vines the GF is helpless against them 1vs1 and with a team you barely make it out of a fight with them if you make it out. It makes the PvP mode boring. The CW andHR see GF/GWF as no threat its like a free kill.
That makes things extremely easy for you ,but imagine if the GWF had a sword throw that imobolized your character for as long as the roots then just hit with every power he has while your stuck there helpless.
I feel the same way you do man. I have a Guardian fighter and is extremely fustrrating. Their roots and vines not only hold me down so I cant get close their vines can inturupt my attacks. That's just the HR the CW is just as frustrating. I hope they fix this if not who is going to be a melee fighter.