Problem with that video, and generaly TB comments is that he seems to not be rly good at playing melee, to not say sometimes just bad. Some difficultites which he has in GW2 are because he just play bad, but he is blaming it on game.
Now Im not saying that game is rly balance, it seems to be more unforgiven to melee then ranged, ammount of particle effect and spells in total make it soemtimes dificult to see whats going on. Im just saying that TB often make mistakes in his gameplay, and comment it as game problem, you need to adjust your opinion to that.
I dont know if it was in that video, but he was showing gameplay from two boss fight - mesmer woman and melee man. If they are close, woman getting aoe knocback aura around her. TB instead of switching target to melee mob, was just runing into woman and complaining about how unfair its knocback for melee. That kind of stuff.
At end its liek Lucky_ said, you can pure melee character who very rare go on range, but it propably wont be optimal. On other hand, game isnt relased, we dont know how balance and overall feel of characters will be with lvl 80 when you have all your skills and trait points and can experiment with differnt builds.