The design doesn't bother me as much. The main Gundam is bound to get multiple upgrades throughout the series anyway so I wouldn't be surprised if this slim shape is meant to reflect its younger, inexperienced pilot just fighting in underground fight club maturing into a more traditional Gundam actually suited for warfare.
Suletta, what the hell are you still doing in the robot?
On a series note, I honestly don't dig this design. Beside the color scheme the suit is completely alien as far as "gundam"-esque design goes. The body is fine-ish as I actually preferred the sleeker design of 00 or all the Frames from IBO, but that head design is possibly the most hideous looking thing ever.
Watching the trailer (though with audio off), definitely was getting FLCL/Disbuster vibes from some of the scenes especially with the character designs. The fight scenes felt very much inline with studio Khara's work in the Eva movies.
Unrelated FYI, the link Mito put in the description directs to their currently-live pre-registration event with lottery chances per successful invite. This is the same as the personalized links you share, but for Mito's link it's not "personalized" as it doesn't have the "u_cude=" URL parameter. In other words, Mito does not even gain lottery chances when you use this description link.
I would've given them that chance, but they chose to just give the generic link. (a positive/neutral/negative thing depending where you're seeing it from)