What mistake? Reinbacher has legitimate #1D upside, saying to take a forward because we need one is also saying "we need forwards".
I don't think I'm underrating the forwards at all. Carlsson, Fantilli and Michkov are all special prospects who would be in 1st overall conversations in most years. But after them and Smith, there's just as many questions on the forwards, and I'd argue more, than there is on Reinbacher.
I'm slowly getting more to the point where if I was to put my money on anyone outside of the top 5 (the group above plus Bedard/Smith) on becoming a top pair defenseman or a top line forward.. it's David Reinbacher and Matthew Wood.
ASP offensive upside is grossly overrated. I wouldn't be surprised if Reinbacher's point production was similar.