For me, it was graphically laggy which is a huge con for me. Could have been the OS or the hardware, who knows but I know for sure that after testing it and using other phones such as the GS3, Nexus and now the DNA the MAXX HD had noticable lag compared to others. Most noticably when opening folders on the home screens. You may not experience the same lag because of homescreen layouts and what not, I don't know for sure but I had unacceptable graphical lag.
In regards to the OS, that may be the case but the leaked version I flashed was pretty close to a release version, basically the same that was running on the Droid RAZR M. Basically the same phone, just smaller screen. I would not be shocked if the released version will have the same issues, Verizon is more concerned with making it sure complies with their "enhancements" more than usability.
Believe me, I am not saying your wrong in anyway. I may have had an internal issue with the phone but I had multiple people who are also Droid enthusiasts look at my phone and they agree that there was certain points that the phone lagged when it shouldn't. It was a great phone, but I think Motorola had a major mistep by not releasing the phone with Jelly Bean. Also, they released a dual core phone when multiple devices (DNA and Note 2) are coming out with quad core CPUs. Yes, that would impact the battery life but with the huge battery in the MAXX HD it would have been a perfect match.