This article suggests that RR was rather scarred by the outcry from Braylon et al. Quoth RR:
"Roy likes the No. 12 and I think he'd be good just staying in that," Rodriguez told Ryan Terpstra on ESPN 96.1..."We haven't talked about (Roundtree’s number preference) at all, Rodriguez said. I've dealt with that thing a couple of years ago, so we've really tried to put that issue to bed."
Whether any of our current receivers deserve the #1 is something people can honestly debate. But it would be a shame if RR felt like he didn't have the authority to offer it to a deserving receiver. The J.T. Floyd incident in 2008 was an innocent mistake, and it sounds like RR doesn't want to give it to anyone now because he doesn't want to deal with the political outcry from Braylon et al. should he give it to someone they don't approve of.
Once RR was educated about the tradition, surely we can trust him to apply it appropriately.