TBH "ranged" classes (and that actually means only FM) can faceroll it with decent gear (source: I'm a FM and I faceroll it with decent gear), I know Summoners are having a bad time and so are Warlocks - at least from [a href="http://www.blade-soul.com/">blade-soul gold what I hear.

But OP probably also meant that it's harder for melee classes to be noticed by Blackwyrm-senpai or Terrors and that they overall have a harder time in PvE.
Which they do, but that's kinda how it is. By definition when you're a melee class you have to be in melee range with your targets, meaning you're more susceptible to damage and cover less area with your attack range, which makes them more challenging to play (but that doesn't mean weaker).

for me all is fine in this game just one thing is sad, very sad always good mmos need to have something fail like only ping wise game, checked today 15-30ms ping at kfm with just awekened siren weap and awekened siren accesories and easy doing mushin 3rd form , than i checked with 150-200 ping cause u know every day ppls have random ping problems cause of ncsoft crappy server...and with that ping died many Times at 2nd form, very hardly killed 2nd form even 3rd form much easier for me with 15-30ping but with even 100+ping u cant do good just waste time playing that..., now im no Wonder why many skilled ppls leaving to a game where servers stability is always good and if something happen they always tell, and here i just wish i not wasted my time geared fully sin to true pirate and all upgraded to max and kfm too ongoing, and sadly must ppls tell like crap at chat without knowing how hard ppl need to play with crap ping and tell shi.ts like learn to cc and learn to dodge and other xxxx just selfish ppls without knowledge

this game is first mmo from all what played p2p final/obt and f2p obt/final and about that game i can say its first ping wise game, in other mmos u can check 50-100ping no difference or difference what we dont see almost xD and here u will see great difference