I have a Maglula, it's not hard to load the last round. IMO it's not worth dropping the magazine, loading another round (Maglula or no) and reinserting the magazine for a bullet that's not likely to make any difference at all.
I've only ever had one issue with a MagPul Glock magazine. My wife fired my Glock19 at the range and got a weird stovepipe but I've never been able to replicate it.