There is pvp for bosses every day, there is weekly TB's there is Daily PA and SA and also guild feud/KOS + RPK'ing. I don't see how you should be bored of ''pvp'' at engdame? I also never said people should be boosted to +50 but lvl 95 is useless. This game (as in pvp) doesn't start untill you are 115 coz you're a 1 shot for anything if you're below it. The grind from lvl 115+0 to 115+50 takes LONG so why not boost people to 115 then they will probably spend $ to buy/make endgame gears while also buying scrolls/seals to grind up to 115++. Also when you are 115+50 you can still grind to farm (hell you will have to if you wanna get option stones for trans weapons and to actually trans weapons as well).
Rohan = pvp, the reason there is grinding required is coz it makes PWI money, people will buy hk's, seals, scrolls, packs and so on. The main reason to lvl is to become high lvl, join TB's/PA/SA/CV.