Now, this might probably be just me, but I do sometimes feel that, for being your JOB, the thing that you can identify yourself to other FF franchises, unlike the unfamiliar classes, we do have very little to run on right now.
I do feel like the Job abilities are more like little flourishes on top of the main foundation of the classes, like you're playing the class with a little extra, which, I think, shouldn't be the case. Now, I'm sure they will eventually add more abilities as the game goes on and will differentiate themselves from the class itself even further, but I do feel that it would be too long until we get more job flavored abilities if we're gonna have to wait for the level cap increase for more skills.
There are many examples that exist in both ends of the spectrum of what, I think, constitute a success in adding something new with a Job.
For some examples. BLM players might get what I mean. Their job abilities hardly change your THM playstyle and it's mostly some nice stuff, like the Ancient Magic (Even if they could have been done a bit better, imo), but, other than that, in terms of gameplay and game mechanics, BLM plays pretty much exactly like THM and I do hope we can see SE work on differentiating the Job from the Class more in the future. Not only in flavor, but in mechanics and gameplay aswell.
There are some better executed examples, like Warrior, where they have their own unique Job Mechanic, Wrath, and we can definitely say we feel something new in the gameplay. There are some "meh" ones, like Dragoon, where they kinda give something new to the gameplay, with the Jumps, but definitely could be better. Maybe by reducing thier cooldowns, which I believe they are doing if we go on what they said on the liveletter, the gameplay change will be felt more significantly. I could go on.
In the end, it feels like most Jobs are kind of incomplete and have some gaps that could be filled, which could justify adding new abilities before raising the level cap (Which will happen possibly an Expansion, though that's just an hyphothesis but I wouldn't want to wait that long).
This is completely my opinion and I'm curious what you guys think. Is 5 job abilities enough for the game until we get a raise in the level cap? Maybe instead of adding Job abilities, add Job traits to add a bit more to the job without adding skills to the hotbar?