Might be a bit of a necro post by this point but here goes.
I actually suggested something very similar on another server recently. Unfortunately, there are two key issues standing in the way of this excellent idea.
First off, while reducing actual power execution time is doable, the technical hurdles necessary to make it presentable are significant. The short version is there would have to be multiple versions of each power animation made for each of the accelerated steps that could be possible. I could go into further details but after talking to folks very familiar with the code I can safely say it would be a huge undertaking.
Secondly, and this is the real kicker, the game already has this mechanic, or at least something very similar. It's called Momentum and even though it would have made far more sense to put it on Kinetic Melee, the original devs put it on the asinine Titan Weapons power set.
So there is our conundrum. If I had unlimited time, money, and dev resources, I would move Momentum to KM and give Titan Weapons a more fitting mechanic. C’est la vie.