My 25 smoothed out a bit, although I do think part of it has to do with my thumb learning to do it better. I *almost* chamfered the hole but thought better of it and I'm glad I did. I'm sure it would have been fine, but if you work it long enough it's not necessary.
I also wonder if the constant cycling of the lock makes the lock bar a little less aggressive in pressure. I wonder because I pushed the lock bar out of the way to see how the blade moves without the detent on it (not hyperextension mind, just a hair more than usual) and it seemed like it opened a (very slightly) bit easier. It very well could be my imagination though.
In any case, SOMETHING will happen over time that will allow you to open the knife easier than you do now, whether that be the blade wearing in, the lock bar relaxing a tad bit, or just your hand learning the optimum way of doing it.