Multiple X-Factors cannot be upgraded in Be A Pro

I already know this is a common issue the community has pointed out. But I feel like it needs to be addressed even more. In Be A Pro, a few X-Factors are pretty much impossible to upgrade past the starting tier. 

The one for my player I cannot get will be the one I based my entire style off of, and that is Big Rig.

I have upgraded all the skating balance attributes in the skill tree and equipped all the salary perks involving the balance attribute to be upgraded. However, I am now stuck on 86 balance. Balance goes up about 10 xp per week in-game which is not significant at all. My player would be in year 20 by the time I got the balance attribute to 89.

An 89 balance attribute is what is required to get the blue tier of Big Rig.

Please fix this EA.