It's no longer cool but for years, the smart people would take a longer slide model and cut the grip module to take the next smaller magazines. Think a 17 that takes 19 magazines or a 19 that takes 26 magazines. This meant that the hard to conceal part was smaller but you had the longer slide for better reliability, ballistics, sight radius etc. With the rise of dots, extra slide for sight radius is a moot point but the fact is that longer slide guns tend to have simpler recoil systems and tend towards greater reliability.
My non-uniform gun is a full-size P320 slide on top of an X-Grip module that has been cut (in a very crude fashion) to take compact magazines. It's just luck but with a magazine in place, this is just long enough to get all of my fingers on the gun in order to shoot it well.
I've watched folks struggle with guns that did not fit their hands for years. For a long time, it was people with guns too big for their hands because they wanted capacity. With the rise of micro 9's I see more guys struggling with guns that are smaller than optimal which they have to grasp perfectly to make everything work. Just saw a guy this weekend with huge hands and long fingers. His Glock 17 was swallowed and he had to warp his finger to try to place it on the trigger in a way that didn't interfere with his marksmanship. I told him to consider adding a Pierce pinky extension to see if it helped.