I'm curious, what don't you like about the execution?
I at least find it to be a passable replacement for semantic zoom.
Not a fan of how small it makes the tiles look. On anything 5"+, I'm sure it looks better, but on a 4.5" screen it looks miniscule. I don't even use that 3rd row option on the 925 because it makes everything go down a size.
I'll upload a screenshot of both my 925 and N5, but essentially, I like the clutter free look. I'm not saying others won't find it useful, but I've got primary apps that I want to access easily, and primary secondary app, like the banking apps, which have my information and I use a lot but don't want them on the home screen. Some stuff I don't mind digging in the phone to access. Don't need it all at my fingertips easily.
Posted Approved by Nexus 5