Can't say I've bad that particular Chrome problem in this context, though it could be that I've not hit any troublesome pages on my tablet.
I will vouch for the long boot times; my current phone (superior specs), watch (running Android Wear & inferior specs), and old phone (similar specs) boot as fast or faster than the Nexus 7. I'd guess that random file read performance is poor for the device, though sequential reads are pretty fast. And the Nexus Player, with its comparatively few applications (native or otherwise) boots quite rapidly, which serves to exacerbate the perceived slowness of the Nexus 7's boot process.
Otherwise, performance seems solid, and a scrolling bug I'd been suffering through since 5.0 hit seems to have been resolved more or less. Realistically, I've only had the device for a year and a half, but things on the software side haven't been better than they are right now for me.