I ask out of curiosity, is the stove pipe issue possibly due to grip issues.. Grip issues caused by the said angle? I am looking for a concealed carry piece here primary.
Grip technique and ammunition quality (power) can certainly introduce the potential for feeding, extraction & ejection problems.
The causes of empty case versus live-round "stovepipes" can vary, a bit, but grip and ammo related influences can sometimes be involved. Live round "stovepipes", especially with Glocks, can be caused by magazine lip dimension issues. Spread lips, caused by either manufacturing tolerance issues, or, by someone having tried to stuff too many rounds into a mag ("Hey, I got an extra round in my Glock mag!!!), may be involved.
While under & over-powered ammunition, as well as ammunition power variations, may cause some feeding stoppages and extraction/ejection malfunctions, more often than not, day in & day out, it can be found to be related to a shooter-related influence. Typically it's found to be something in an improperly firm grip, and/or an unlocked wrist.
Playing around with recoil spring assembly rates, as well as an occasional out-of-spec recoil spring assembly, may also be involved.
I recently had to resolve some rather drastic ejection inconsistencies with a guy's Gen4 G23. (All over the place, including into his face.) It had the current Gen4 G23 RSA (marked 0-3-3), but the old-style .40 ejector. I replaced the ejector with the new-style and the problematic ejection was resolved. It was the opinion of myself and another instructor who watched him shooting when he experienced an empty case stovepipe that a momentary inconsistency in his grip had occurred. (Interestingly enough, the shooter also agreed that his grip might have shifted for that shot, during that shot string.)
I rather wish my own erratic ejection issues with a late model production Gen3 9mm I bought in '10 had been as quick and easy to correct.

I did finally resolve it, with the patient help of Glock, and trying a number of different parts & assemblies before finding the right combination for that particular gun.