I grew up with LEGO so the bulkiness of it probably impressed me.
The ground clearance could be increased by nudging the bottom of the hull a bit. It won't show at all ingame, but that's no excuse for sloppy design. the tracks already go partly into the top armour, and they are protected against stuff which falls from above.
The sides sticking out... I'm not sure here. They make the character of the tank to me. It does look a bit dysfunctional having a meaningless edge stick out like that. I did not want to place the tracks further out because they needed to line up with the rectangular bit. I did not want to make the rectangular bit thicker because that would make the tank too blocky.
Perhaps an upside down slope could be used on the bottom side, but it would have to cooperate well with the texture on the side of the track so it doesn't just clip into it.
The Flash is a light tank though, so it may have done some armour sacrifices.
As for the turret.... The Arm has this... what looks like a little blue cockpit window on the KBots (similar to a
Zoid cockpit). I didn't do a side view of the turret head, and I haven't quite figured out if the guns elevate independently from the head or not.
As for the guns, I like to draw the EMG short because long barrels somehow suggest range and accuracy. I came up with a color coding system for the weapons once, but it breaks canon and I'm not sure whether I should use it.
The think long barrel really needs a 'bridge' to where it connects (getting wider, looking less stuck on), but I saved those polygons. Overkill perhaps.