As regards the heel latch, reliable and consistent magazine retention is by far the most significant parameter affecting semiauto pistol reliability. The P210 setup ensures it better than the vast majority of alternative designs. A brief look at the bearing surfaces suffices to show that the lateral release is inferior in this regard. I suppose that something along the lines of the Don Giovanni mentality might account for being more concerned with dropping a magazine at will than keeping it in place. My priorities differ.
Having shot the P-210-6 and a number of other gun in IDPA competition, I will note:
1) I don't think that mag retention is the most significant parameter affecting semiauto pistol reliability. Mag function, extraction, and a few other issues seem to cause far more problems on the firing line and in competition.
2) the heel latch is slower than the common alternative and speed does sometimes (not always) matter.
3) having shot thousands of rounds in competition (which is a poor-simulation of real-life situations, but a better proxy than simply punching holes in paper targets from a fixed position), I've yet to have a mag drop free when it wasn't wanted -- regardless of the gun.
keeping one's hands away from the mag release is little different than keeping one's thumb OFF the slide (if you shoot thumb high), or your finger out of the trigger guard, when it shouldn't be there.
4) In a life/death situation, I'd like more than 8-rounds in a mag... especially in a 9mm weapon. I've got a customized CZ-75B SA that is very accurate, and it holds 16 rounds; I also have a wonderful BHP that holds 17 rounds. I like that.
The P-210 is a wonderful gun. I never had a problem with hammer bite. The sights on mine, however, left a lot to be desired -- both optically and physically. I lost blood a number of times due to sharp edges on rear sight blade. (I eventually wised up and took the sharp edges off with a file, and polished and reblued the sight.) Just grabbing the slide in a malfunction drill could be costly.
I shot my P-210-6 better at 25+ yards than any gun I've owned -- when the lighting was right. But I guess I'm a contrarian, as I don't view it as an appropriate pistol task to do things at much greater distances than 25 yards. That some guns do it well is admirable, but why bother? Isn't that was rifles and carbines are for?
5) As you say, priorities differ.
I want a gun that is accurate, easy to handle, has the potential to go longer without reloading (should that ever be necesasry), can be quickly reloaded, and is reliable. For me, the P-210 didn't hit all the marks. It
was wonderfully accurate and reliable. And the quality of worksmanship was like looking at a fine Swiss watch.
I sold my P-210-6 (along with a collectible Luger) and bought a nice used pickup. I guess I just wasn't marksman enough to realize the extra measure of accuracy it provided.
That said, were I to come into some money, I'd probably spring for one of the P-210-8s, if they're still being made... with the mag release button higher on the grip.