I won't have a problem paying $15 a month if I enjoy the game enough.
I payed the $15 a month for WoW because I really enjoyed it and pretty much all my friends were playing, so I could play with them.
I don't think too many of my friends plan on getting Huxley when it releases so I have to rely on getting them to play after I get the game and see that it's awesome.
If it's a mediocre game then obviously nobody is going to want to p2p anyway and it'll probably get changed.
But we all know Huxley is going to be amazing so I'm sure it'll be worth it to pay monthly
I hope for a lower fee than $15 but we'll just have to wait and see.