First, the VF-25 has tons of robo kibble, it is just all on the back.
Second, while the VF-19 has shorter wings then the YF-19, the effect can make it look LESS sleak because when they fold up the do not create a smooth surface along the back edge of the wing to the hip gun, giving it a jagged, uneven look.
I agree with others how this design is awesome because it looks nothing like a plane when transformed, even with the hip "guns". No other VF that I can think of(other then maybe the VB-6, but that is not exactly sleak) has a battroid so removed from the fighter mode.