Hmmm... Google Play clearly shows the last update to Maps was August 16, 2012.
But if there is an Update button on GP, then you do not have the latest version they have online, but stay with what 6.3 (stock) or sideload 6.9.2 until it has been confirmed a new version fixes the issue.
To be honest, I don't think this is Google -OR- HTC's fault... this could have been fixed a day or two after the version of ICS that Verizon currently has was determined to be the issue and the new 4.3.605.2 firmware was determined to work fine and be more stable than the current one. Verizon could have done an emergency push of the update, and by now all of these issues with Maps would be gone and the issues of heat, lag, battery life, connection loss and most other issues would be resolved for most people.
I blame Verizon for not fixing this quickly, they could still do it now if they were so inclined, but they hate Google and HTC, so why should they bother... it might push a few people over to Motorola, Samsung, iPhone, or Windows phones, which they like better anyway.