Gen 5 may be pretty much the same thing, but Glock has taken all the constructive criticisms as to what would be better, and fixed them. These are all changes that Glock guys want.
Not quite all, I would say. I'd have liked to see:
-Steel sights as standard with either a fibre-optic dot in front or Glock factory night sights all around. These options exist and virtually every law enforcement order specs these sights, so it's not an unreasonable request.
-under-cut trigger guard - something EVERY aftermarket frame has and would be easy to do, so the weak hand could choke up higher on the gun.
-the end to gimmicky rifling - just copy the Lone Wolf LWD-17N, nitride it, and call it done. We deserve rifling such that glock can recommend lead bullet use.
-Change the large rectangular serrations for standard sharp serrations like on a military 1911 slide. The glock ones are "ok", but sharp serrations would be more functional.
-Optional frame with no light rail. Light rails are just another snag point on a range-only gun IMHO, which is what most Canadian shooters use these for.
That's about it. Add these things to a Gen 5.5 and I think they'd be OK for a long time to come.
I don't need curvy aesthetics on a slide, fancy wavy S&W style serrations, lightening cuts, or any of that stuff. I don't need a threaded barrel or a super-light sub-5# trigger that won't make IPSC weight. I don't need fancy paddle mag releases, or de-cockers, stippling that looks like picasso did it, beautifully machined trigger bows, replaceable grip side panels, or fluted barrels. these are just useless gimmicks to catch the eye at the gun shop or that promise performance improvements that never realy manifest in anyone's groupings. Let other manufacturers worry about looking ###y for an extra $1000 dollars (i'm looking at you HK, Tanfoglio and Walther).