It's not exactly the 25's nose. It's suppose to be more boat shaped like the YF-21 and less torpedo shaped like the 25 and 51. I've always hated that part of the design. The only thing similar is the length and the verniers. And yes I do think that the fuselage looks a bit short. It's based on the VF-25 and overall it should be about the same length. I hate how the wings on the 25 sit really low in battroid so I removed the "shoulder plate" (the one after the "collar" plate) and added the "bump" (which is the backpack thrusters in battroid mode). The thin line is where the thrusters separate from the legs. I also don't understand what you mean by "straight from the nose to the rear of the engine nacelles." The engine nacelles are similar to the SV-51's and the overall profile is flat like the YF-21.
As for the name, it's not that important to me. Unlike you, the name to me doesn't have to be meaningful. I'm not anal in that area. My first idea for the name was to be some fancy, cool sounding translation for "bird of prey" but that didn't work out. Japanese or German didn't sound cool. I also didn't want it to sound like Transformers with dinosaur names. My 2nd idea for the name was Knightwing but that sounds like a squadron to me. I named it after the Lexus SC300 or The Toyota Soarer in Japan.
No transformation yet. Still trying to figure that out in my head. But I can say that the nose cone will become the crotch in battroid mode.