The name varies a bit (slide catch on a Sig Sauer), and with most guns, it is perfectly acceptable to use it to release the slide. On my Kahr, it is the /only recommended/ way to release the slide (Sig says either is fine). In any event, yes, it's intended to be harder to release if the mag is empty. And of course, you cannot release the slide by pulling back on it with an empty mag, while the slide release will work. Lastly, it will get a bit easier to push down as the gun breaks in.It is NOT a "slide release". It is a "slide stop". Rack the slide.
The name varies a bit (slide catch on a Sig Sauer), and with most guns, it is perfectly acceptable to use it to release the slide. On my Kahr, it is the /only recommended/ way to release the slide (Sig says either is fine). In any event, yes, it's intended to be harder to release if the mag is empty. And of course, you cannot release the slide by pulling back on it with an empty mag, while the slide release will work. Lastly, it will get a bit easier to push down as the gun breaks in.
I understand your reasoning, and don't disagree, but the action of clearing a malfunction is COMPLETELY different than racking the slide back a fraction of an inch to release it. So much so that practicing one might make the other more unnatural, rather than less. For SD or competition, where speed is important, it takes far longer to move your hand to the slide to release it after inserting a magazine, instead of simply pushing the slide stop down with your thumb, and it /requires/ two hands, so that is something I wouldn't even practice with. Personally.I like the approach of racking the slide, so in the moment of reloading or malfunction, the movement is the same.
When you wear the damn slid stop out using it as a release and your slide will no longer hold open on the last round don't come bitching.