Granted I haven't been on htc for a while, but I'm pretty sure with the custom recovery in place, you could download the OTA. But it's going to fail when you try to install it, because it needs the stock recovery to install an OTA.
The easiest method, wait it out for a dev to update to the latest OTA, flash the newest radio along with the updated rom for that OTA.
However if your persistent on taking the official OTA , flash on the stock recovery to get it to install. Doing this, I'm almost 100% positive, will kill your root. And if your Hboot gets upgraded, depending how quickly the devs are working, there could be a short wait on a new root.
Having that said, just flash a rom based off of the newest