Honestly, not the worst idea ever, a fast amphibious tank would be pretty interesting and fun to see in the game. Only problem is that the tank is massive and incredibly vulnerable, stealth is impossible. In maps without water, expect suffering. And a 30mm bushmaster cannon? Yeah, no thanks
9.0 I can live with, the calls for it to be 8.0/.3/.7 are ridiculous though. We need grounds BR to be expanded to the same max BR as air (at least, and air is a mess of compression as well).