Is there a reason why they don't just give us talents at level 10 and every 15 after that like 10, 25, 40, 55, 70, 85, 100 instead of 15, 30, 45, 60, 75, 90 and 100?
It might seem like a stupid question but my OCD is killing me.
Because 15, 30, 45, 60, 75, and so forth are natural landmarks in the development of your player character. At those levels (or very near those levels) you unlock incredibly useful abilities or skills or awesome game features. Giving you an extra talent point with that makes the experience even more exciting.
It could also because having it every 15 levels also helps break the monotony at low levels:
Level 10 pick specialization
Level 15 pick first talent
Level 20 get 60% mount
Level 30 get second talent
Level 40 get 100% mount
Level 45 get third talent
The theory starts to fall apart above level 45, but that's my theory at least.
Diablo: mrgummage#2816 : World of Warcraft: Grand Marshal Hottage : Overwatch: mrgummage
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Level 15 pick 1st talent
Level 20 get 160% mount
Level 30 get 2nd talent
Level 40 get 200% mount
Level 45 get 3rd talent
Level 50 get armor bonus
Level 55 unlock DK
Level 60 get 4th talent, 250% flying
Level 70 get 380% flying
Level 75 get 5th talent
Level 80 get Mastery, 410% flying
Level 90 get 6th talent
Level 100 get 7th talent
Now to the OP's question: I agree with Voyager that they might change it so that, once again, the talents are spaced evenly.
"We don't care what people say, we know the truth. Enough is enough with this horse s***. I am not a freak, I was born with my free gun. Don't tell me I'm less than my freedom."