In light of how many in this thread feel, it would have been better if v5 was never mentioned. This is why some companies don't announce future versions of software and hardware. If a hardware maker announced a new laptop was coming out next year you may not buy the current one or you may not be happy with the one you just purchased.
I'd like to see leaner code and stuff like that too. Mod developers aside, I still feel that if there was a simpler way to upgrade, a new version would be welcomed, as it should, instead of bemoaned.
So bring on the new versions and features! Just make sure the very first new feature is a completely overhauled upgrade system.