One of the most unique types of tank concepts I have seen. It's almost like the futuristic version of a self-propelled artillery. You definitely took time to make a thorough renovation on this concept, as you decided to make it more realistic. Although I think that the tank is overpowered, it sure looks "over-cool."
In general, my best point about this tank is that it clearly is a unique tank; specifically, it is a war machine with a unique type of "cannon." I appreciate your originality, which is your number 1 thing about it. My biggest objection is that it's overpowered. When I mean that, it's not the Danium blast; it's that it has too many protection systems in place. The Danium blast more than makes up for the protection system.
However, at the end of the day, this tank rocks. I appreciate you putting much thought into it. Congratulations!