That would be fine, but I am at Kanto E4 and allready have 60h gameplay. Johto will take a similar time I guess, thats allready 120h of gameplay and not even near pvp yet, only beating the game so I can get access to every area and start farming poke for pvp. After that comes EV training. I would say it takes around at least 200h to get to pvp which is a LOT! Most players give up before that and then there isnt many players that can put a good fight in pvp. I dont want that... nether should you.
And yes, story is nice and any pve content would be warmly welcomed since not everyone is crazy about pvp. But harder =/= better, thats only true if the reward is realy exceptional, maybe a legendary that only apears once every month and one has to go trough hell and come back to get it would be nice, on the other hand it would mess up pvp.