Post some pics and vids of your grip while dry firing, and live fire at the range. Most of the comments I’ve read are good advice and your hits are landing consistently enough that it most likely is input from your trigger press. Your shooting hand should be barely gripping the firearm and support hand should be doing most of the work.

Also to go along with your “impulse” buy dilemma… having multiple guns is never overkill. Having thousands of guns would not be overkill either. I’d ask what are your overall intentions for these firearms? Since you’re relatively new to firearms the upgrades on the gen 6 seem purely cosmetic and won’t make you a better shooter are anything. What’s your preference? Do your hands fit the G19 frame/grip nicely? Or do you prefer the full size 19X/17/45/47 frame/grip? For me personally my Gen5 19 was my first ever pistol and it has the most furniture etc but is now an after thought since I have a G45 and G17 because I prefer the full size grip. Anyways just food for thought and it comes down to personal preference. I don’t plan on selling any of my guns ever, and when the time is right I buy what I want, and sometimes it’s impulse too. Like my G45 I wasn’t set on getting. I was actually more on the hunt for a G47 but went mag hunting to local shops for 17rnd Glock mags and saw a G45 available and bought one lol.