Well, it did seem like a great idea....but now I can't get the slide off the gun, and it's not like I haven't done it before! LoL. Those little things you have to pull down are really tight, and I can't hold them down to slide the slide off....dang!!!
(Not quitting, though, just taking a cursing break.)
Getting that spring in and out of the magazine release is much harder than taking the slide off. Your magazine release is on the correct side...it really isn't a good idea to swap it to the other side. Speed and smoothness will come with practicing good technique...not gimmicks or unnecessary aftermarket parts. People make USPSA and IDPA master every year using stock Glock mag releases and the stock setup is best since it is also your carry gun.