I agree they need a RB. Also re: Evans it's not about giving up on him but rather being realistic. RB is a show-early position. So Evans is simply a non-factor in their roster build at that position. It would be foolishness to position yourself to count on him.
So yes they'll go get one. Question is can they find the bargain in this market because you don't want to tie up too much cap space in RB. And if not then they'll draft one for sure.
You may be right about them taking one earlier than suspected as well. There's a couple who would give us a real nice power look in combination with Williams. Though maybe I should cool my heels on that and just be thankful McVay has learned to appreciate power up front on the OL.