I havent rooted yet was expecting ota looks like i need to flash it myself again whats the improvement with updateAndroid police posted the OTA updates for 5.02 (5.0 --> 5.0.2), for our Nexus 7. You should check out a few of the recent posts there.
I didn't get the OTA, but i could simply flash the 5.0.2, after unrooting via SuperSU app, installing back a stock recovery. You can do that too. Stock recovery is needed because flashing OTA will fail on a custom one.
I haven't done it, yet. Lazy.
And are you feeling performance drop ?