Why has she not gain any powers like an advance invisibility power or something? Intelligence alone is great an all but  still something is missing.

Idk but considering her brother is potentially one of the most powerful characters I think they are gonna ride the evil genius route.

Every future and alternate universe version of her have massive powerlevels.  Wait til she hits puberty.  Mutants, other than reality warpers like Franklin, rarely manifest before puberty.  Just give her time.
Older versions have shown force fields like Sue only better, intellect above Reed, and time manipulation.

Franklin is an Omega level mutant, Valeria is not going to be that far behind.  bag_o_x_men is correct, wait till puberty which I expect around 2035 at the rate the kids are aging .

I hope she doesn't get any powers.  Franklin is powerful enough.  Besides, with her intelligence, she can easily invent any gadget she needs to give her any powers she wants, so whats the point of having powers.

I'd love Val to get some powers, maybe not too powerful like her brother. 
But maybe teleportation or something unique. Don't give her the obvious  'invisibility' powers though. 
Or maybe being able to shift into older Val? I liked older Val :D

I hope she doesn't get any powers.  Franklin is powerful enough.  Besides, with her intelligence, she can easily invent any gadget she needs to give her any powers she wants, so whats the point of having powers.

I think it'd be interesting if the only power she develops is that her brother's reality-warping abilities are unable to affect her.