I have been making very similar changes to my forehand as well...
At first, from my view, I felt like my shots were slower... but some opponents told me that I'm actually hitting more solid and heavier shots after the change (from loosey-goosey wristy slap shot to a laidback/firmer forehand with decent pronation).
I admit, my control of the forehand has improved after the change, and I am using less energy for the same amount of pace and topspin.
In my case, my follow through has changed quite a bit, and on high balls my swing path has changed too. On high balls, I used to really have an extremely low to high swingpath, but now it's more like my racquethead dips down just before I hit the ball. Again, this is only talking about hitting very high forehands.
For the general shots... My follow through has changed from what used to be more across the body, to something like a swoop forward and up that ends up over my left shoulder (but it feels like I'm just driving the racquet much more forward than before). The hip turn is less pronounced than it used to be, but it's still there. Stepping in has become much more common in my forehand instead of sort of exploding off the ground with an exagerated hip rotation. I haven't seen myself on tape yet, but my mental impression of my follow-through is that it's a lot like the Robert Lansdorp hold your follow through form (just lookup almost any article on Lansdorp and the forehand).
I like the change, and it's weird because I didn't really do it on purpose. It just sorta happened out of nowhere and has been the way I've been hitting my forehands most of the time lately.
I definitely feel the ball much more than I used to, and I like that.
At the end of the stroke, I do believe I have made some sort of pronation, but it's not like it used to be. It's more like the forearm and arm overall has sort of done the pronating, as the wrist has remained somewhat laid back.
Anyhow... those have been my thoughts on my forehand lately. But I probably won't really know until I tape myself.
-Chanchai