Lately, every time I've allowed a google app to update I've regretted it. I was just fine with gmail the way it was. The latest incarnation I just don't like. For one I really hate how they are starting to ignore the menu button on phones that have them. I like having a menu button down at the bottom of the phone, close to where my thumbs are naturally. If I wanted an iphone I would have bought an iphone.
In any case I've learned to never update a google app that I like. One of the biggest problems with the Google Play walled garden is the complete lack of version history. Once a new version is out, the old version is gone forever. Always backup your apps before upgrading I've learned (and forgotten too many times).
But the real problem is that google apps are getting bigger and bigger and slower and slower. I don't install very many apps, and I finally ran out of space on my older phone, due to mostly google apps getting so huge. And over time my phone is getting less and less responsive. It's not like I have a lot of apps installed, and I never automatically update them. I do it judiciously, after looking at the changes list.
As I mentioned I don't update google apps much anymore, but the Google Play app and infrastructure update automatically and silently, and I have a hunch this is part of the slowdown. Sometimes I get a ton of "google play services has stopped" error messages until I reboot.