The only trade off is this : Monthly subscription! Don't get me wrong, a $5-$7 per month is acceptable, but a $15 for a 0% yes 0% story is just too much! You can't compare MMO-RPG with this game, the amount of data, quests,text...etc is enormous! Planetside has nothing!
Just lower the monthly fee subscription by at least 50% of any normal MMORPG and you got yourself a good committed people.
To be honest, with BF3 around this game might not appeal to many specially since Planetside 1, ended up with bad addon! They lack fiction scenarios.