The Glock 42 is the most finicky Glock I have ever shot. I am not a Glock guy at all but they usually run. Anyway tried some Flat nose FMJ ammo, it hated that I had at least a jam in every mag. Round nose FMJ ammo was flawless. 90 grain Speer Gold Dot JHP ran well, it did not like the Hornady 90 grain JHP. I know they will sell a bunch of them because its a Glock, but I really don't know a lot of people looking for a big .380, it would be much more attractive as a small 9mm.
I run my .380 strictly with FMJ at this point. It's my opinion, and the opinion of learned folks like Dr. Gary Roberts, that HP ammo is pointless in pocket .380s. Hollowpoints just don't expand and penetrate enough to be effective in this platform. Given a choice between expansion and penetration, I choose penetration. FMJ gives me more chance of that.
That being said, I'm turned off on the size as well.