While it looks great by it's own, the YF-19 really needs to be paired up with the 21 to be a complete set. It'd be like releasing the tv Max VF-1 only. It just looks lonely and out of place without Miliya's VF.
And yeah, count me in as one of those that missed out on the VF-1J DX. Looking at the prices now, it far exceeds the prices going for the YF-19 in many cases.