OL is mostly set. WRs at the end of season and playoff game were:
Devin Funchess
Russell Shepard
Kaelin Clay
Brenton Bersin
Mose Frazier

If you're wondering who any of them are, you aren't the only one. Funchess is okay but is best as a middle of the crop #2. None of the rest on that list should even be on an NFL roster. Cam needs some WR help. Both Clay and Funch dropped TDs that could've won the game. Amazing Cam did so well that game with those terrible receivers. Samuel and Byrd who both got hurt are okay but the team really needs to upgrade WR this year, whether through draft or FA.

And the Kelvin Benjamin trade wasn't even a huge problem. He wasn't that great either and didn't do anything in Buffalo after the trade.

As far as Norv Turner goes, he's had tremendous success as an OC throughout the years and has gotten 3 head coaching jobs because of it. Mike [[only have a job because my last name is) Shula literally has never gotten a sniff as a HC at the pro level and failed in his earlier stints as an OC and outside of 2015 was terrible here. Turner will run a similar system which is good but he's a significantly better situational play caller and really just all around coach at getting the most out of his players. Not my preferred option and he's certainly no Kyle Shanahan or McVay, but he'd still be a huge upgrade on Shula.