A Balance epiphany

So, having been playing on/off since season 2, and with the nonstop complaints about balance, damage, CC, mobility, etc. One factor that seems ignored almost entirely is how reliant and mainstream cooldown reduction has become in the meta. Considering the upcoming update on immobile mages, which was initially one of the few classes in which CDR was core for mitigating their windows of weakness, think, for a moment, what this did to assassins, adcs, and to an extent, bruisers and how easy accessibility to this has tilted their balance.

Just my 2c, feel free to add input.

Edit: Bringing masteries into this, looking at intelligence boosting the cdr cap to 45%, what if classes of champions had specialized limits on cdr? Would this be too severe on enforcing the meta? Or another possible balance stat?