What FA WR who can contribute immediately will be out there (serious question)? I hope you're not talking about a big money FA, because those guys hardly ever work out. Your assessment of Britt is way off, imo. Dude is a solid receiver, and like someone said earlier, he is a pretty good #2. He's been open quite a few times only for our QBs to miss him completely or not get the ball to him effectively.
Yeah I seem to be very much on the negative side of things when it comes to Britt so not a surprise to see disagreement. But IMO if the Rams enter next season with him as a guy they're counting on it's gonna be more of the same old sorry offense. Good receivers do more than just get open once in a while, Britt has a tendency to disappear and is not reliable and the QBs know it which is why they don't trust him.
Here's a list of next year's FA receivers. Still too early to know who will be franchised or whatnot, but there's gonna be some options that can help this team and regardless of the recent track record on FA receivers the Rams are going to get all up in that market. Doesn't need to be the highest paid option, just someone who can provide our QBs with possession/chain moving ability.
Right now the Rams are not getting good QB play, but I don't blame everything on them. OC needs improvement and so does WR. This org needs to quit screwing around with high talent/low production developmental types and get some guys in here who can run routes and catch the ball. Guys the QBs can trust.