To simple echo was was already stated by a few like Frost and M1K3, MMA striking is just that, MMA striking.
It is NOT boxing, or KB or MT, it is unique to MMA.
Boxers and boxing coaches are notorious for their ragging on MMA striking, heck even I STILL do it at times, but the fact is, you try to strike in correct boxing from you will get taken down and beat far more easily, as been shown over and over.
MMA requires a more stable and wider stance with less forward leaning than a typical boxing stance or even a MT/KB stance.
You need a hybrid wrestling/KB stances and you want deliver much power with strike done in a "correct" boxing manner from that stance.
In many ways the "looping and long arm" strikes of CLF or even HK lend themselves better to MMA than do classical boxing.
The fact that the bets strikers in MMA have a solid "traditional" striking background BEFORE they adapted to MMA simple shows that a strong core in a "classical" striking system builds a far better "power platform" than what is typiclaly taught in MMA from the get go.
Psalms 144:1
Praise be my Lord my Rock,
He trains my hands for war, my fingers for battle !