I believe the reasons to be very valid and gladly support the P2P model. I really hope they don't change it. There is enough F2P games out there to fill that need.
Click to read Yoshida's defense to P2P model:
http://venturebeat.com/2013/06/17/final-fantasy-online-director-defends-monthly-subscriptions-in-the-golden-age-of-free-to-play-exclusive/
Haha Sleipnir, I'm double dipping!

PS4 version wont be out for another 6 month+
They will work on Direct X 11 upgrade for PC after launch and while at it make the PS4 version using that. I'd say get the PS3 version or PC version for now. I mean, it includes the first month fee so you really paying $17 for the game itself plus the pre-order bonus and early access are worth it. If you in doubt, Beta Phase 4 will be open, I'm guessing it will begin sometime next month. Try it, before you buy it!
You can tell we fanboys by our icons, but I'm not a legacy member because FFXIV 1.0 was horrible. I will get standard monthly fee since 1 character can unlock everything so $12.99 is good enough. I only tried the beta because I wanted to see the differences between 1.0 and 2.0 and was blown away from how much better it is. Really love this game, best MMO I personally played. Everyone has their own taste though. I stopped played FFXI, Tera, and Perfect World.