I see a lot of people that actually have not played Blue Mage wanting it to be just a watered down boring 1 2 3 job same as the other ones.

It's a new thing, didn't you all get to experience the awesome leveling experience of roullete with 15 jobs already? need to be 16? As if you all will be unable to play Blue Mage because of the Limited aspect. Just don't play it then. It is Blue Mage, and that's the most important thing. You can party up, you can do instanced content, that's enough.

They can't initially do Palace because players will get to Lvl 50 without any ability and queue roullete to be useless.

I can't believe that this "limitation" will be forever, they just didn't have the time to code it, they need to produce the content for 51~60, 61~70 and 71~80, and I think that there will be A LOT of abilities. I'm sure when 5.0 is out they will have the time to start developing and changing these limitations. The systems sounds really good to me, I will be able to play as Blue Mage canon to the franchise concept without any "you can't do that because gameplay balancing".