Was at the range a few days ago and took a very expensive 1911 9mm to have some fun with. Set the target up at 7 yards and used high quality factory loads. Didn't have a particularly good group, and everything was to the right. Not very impressive. After about 30-40 rounds folded things up and after tearing up my target, went home. Two days later back with my pretty new (less that a hundred rounds) Gen 5 Glock 19, and same target at 7 yards basically one hole, and all centered and 50 pretty accurate rounds. The Glock was stock, Ameriglo sights from factory and hardly broken in. Trigger pull a measured 4.1 pounds vs about 2 lbs on the 1911. About $3,000 difference in price. I don't think the sights were off on the 1911; I just shot the Glock better. I know, a really cool paper weight. And for years I was a 1911 guy. I have another 19 that is my EDC that I've fired several thousand rounds through plus taken a few firearms courses with.
Expensive guns dont make you a better shooter just like expensive golf clubs dont make you a better golfer. They are just tools.
You just may be a bit recoil sensetive after a long layoff with full power 45acp. I stayed off my 45 for about 2y & it took me a few mags to get comfortable again, but I would need 200 or so to get back up to my original accuracy level, especially if shooting at speed.