"Users of rooted handsets and custom ROMs will likely be out of luck attempting to install Android Pay."
Which doesn't suck at all, except for a) all the tons of crap apps mobile operators force on you in the stock ROMs; b) the number of perfectly good phones that are orphaned once said operators lose interest in upgrading them. A year or two into deployment, I expect, or whenever they start pushing the latest new Shiny.
Cyanogenmod makes my phone more configurable and leaner at the same time, as well as being able to run the latest builds of Marshmallow instead of an old version of Lollipop. It's actually more secure than stock ROM, which will never be updated. Google Pay can suck my left nut.