Alreydy watched up to 12...
Uhhumh. You say you disagree with me completely, but I don't disagree with what you wrote there. Nor do I see how it conflicts with what I wrote. I said it was a smart move to make Alice so young a Prima, in the younger company. Alice pretty much is a young genius. If she had taken much younger, much of what makes her special would have been lost. While there's no question of her skills, she's still a bit immature. However, experience and age will sort that out and nothing else so it would be no basis for not promoting her already; further training wouldn't really do much difference.
Aika is already older than Alice, and for all we know she might be old enough to be a Prima anyway, normally. I said she needed to be really ready before becoming one, and not like Alice who obviously is meant to still learn a lot while doing it (she's so young). And obviously we saw exactly why: Aika was moved to administration right away. That's a place where you need to know the stuff already and not just learn anymore along the way.
And last but not least, I said Akari was the one that could have become a Prima arbitrarily at any point. She might be a genius after a fashion by her own right, but otherwise she had no burden on her shoulders. She's not a publicly rumoured prodigy like Alice, she's not a heiress (well, she is but not literally like Aika), and furthermore she's in a company that's not really trying to compete in the big business. So, her promotion was only up to her skills and attitude and whenever Alicia decided to have her exam, with no external pressure of any kind as such.
All in all I think this whole promotion issue was a complicated thing. Basically there was no real reason for them to compete who gets rid of the gloves first. They worked for different companies. However, they are humans and so "losing" surely can frustrate. And furthermore, their instructors had been in a similar situation and very well knew what was going on. I think it wasn't easy for them, either. I haven't yet seen the last ep, but I think the three Fairies must have considered not only the technical formalities of the promotion and the situation of their own companies but also the situation of those three friends and what it would mean if one of them suddenly got promoted, the other two left behind. In that sense I was a little surprised it took months for Aika and Akari to graduate after Alice. That being said the fact the last two were promoted so close to each other made perfect sense.