Yeah, but how screaming fast do you have to come in on approach? The stall speed on that can NOT be comfortably low...
It's going to be noticeably draggy-ier than a Viper by that high cockpit, which probably generates some weird vorticies. It's also going to be heavier to account for that GAU-8, but the increased surface from a cranked arrow wing should offset quite a bit of that. I'm not saying this thing would ever be mentioned in the same breath as the P-51D, but I doubt it would a B-26 either. Digital flight controls should address
most of the weirdness cause by the strange layout, but there will still be a lot of quirks. Although I am concerned that control authority at low speeds might become an issue, regardless of lift. If this thing was meant to be some kind of next gen A-10, it won't have anything like the low speed performance or loiter time.