Its actually smarter to stop doing story missions at lvl 62 and only do daily + bounty. They need at least 1-2 month too increase the lvl cap if you hit lvl 70 in 2 weeks you waste a huge amount of exp from daily+kyubi+bountys. And the rewards from sage battelfield are more worth than a free draw from 70 thats like 3 free sealscrolls per week maybe 4 if your team wins.
In addition too that as soon as they update the game you have like 20 stroy missions too do which leads into a huge lvl advantage compared too the ppl who power lvld but only if they rly need the 2 month for the update like in german version. As far as i can tell they wont update it faster since they lose money if they realese all at once. Small updates = every week money.