I am afraid you may be right about the design.....It's like looking at 5 "mid-size" cars without their badges...who can tell? However, the Mercedes pricing is right in the "sweet spot" of the Mustang - $29,900. So, would you rather have a Mustang or a Mercedes
You will never find a CLA on an M-B dealer's lot for 29,900.
Conservatively optioned, they will be 34-35K. Loaded up they push low 40s. That's a lot of money for a front drive, 4 cylinder car that doesn't come close to the Mustang in performance.
If you want that car to challenge GTs and maybe even the new turbo 4, you would have to get the AWD CLA AMG, which tops over 50 grand.