Why do you LOL at facts? Go look at recent drafts compared to the 20-30 years ago. Look how many teams run platoons. There will always be RB's and always be workhorse backs, but there are fewer of the them now. I don't see how that can be argued. The ratio of rushing att to passing has gone from 60-40 run to 60-40 pass in the last 30 years.
They are not losing their value because of one draft and a pass happy leagues. Sure it's switched from the deman it was 10-15 years ago because backs aren't as durable anymore. If Lattimore, Knile, Dyer, and Lacy had come out this year without the injury history and maintained their 2010 production, you would not have 17 lineman drafted in the first round.
Sure you have the platoon style because those teams have no great back. Physical runners need a COP back and backups in general. They also put a higher grade on blocking and receiving now than ever, which is why Benard and Lacy were two of the first three off the board.
None of the backs this year screamed (game changer) to be drafted first round. If anything Alfred Morris undervalued the position by being so good his first year but Doug Martin(1st rd) was also good.