Nothing really, just a hunch. If it took them this much to do such a (big!) change to Sidesteps, they will want to see how it works out with the public over a certain amount of time. At least as much as they've taken from release 'til now. But given how summer is behind the corner, I don't see them doing anything to sidestep before September.
By then people might have stopped complaining/whining and they might simply decide to leave things as they are.
Some people in this thread are happy I bet. Someone actually made the exact suggestion of making so Sidestep would require a certain amount of break gauge.
Personally I hate these gauges mechanics, and as long as things were as simple as DoA6 launch (100/50, just Break Hold and Break Blow) it was an acceptable compromise.
Furtherly complicating things with yet another move that requires gauge and splitting the gauge in 4 is... I dunno, more than I'd like it to be.
I will of course keep playing and enjoying DoA6, but I can't say I consider this a change done in what would be the "best" way. It just sounds like a cheap/fast patch, done wrong.
I still think Sidesteps weren't all that powerful to begin with, granted I can acknowledge something had to be done.
More than anything this all sounds like TN bending over to please the whiners, if you ask me.