Order of needs as I see it (not necessarily players)
1) STUD Center. #1 need and it's NOT close.
2) McVay MUST revert the changes in the offense and bring back the deep routes. Martz liked to use MaxQ or 6 sigma as an idea and it was always problematic (for Martz, a play that scored, but got the QB blasted was a positive...which is part of why he's not coaching anywhere now) and McVay has a similar sin that that's "efficiency". McVay's pursuit of ever greater efficiencies ignores the single greatest axiom in the modern NFL: The greatest ability is availability.
Players can become unavailable due to injury, but also be taken out of the game by the opponent's scheme. When we factor in how often Goff has no one to throw to or how often an RB is met at or before the LOS, this offense isn't nearly as efficient as it was in 2017-18. Why? At a certain point, greater efficiencies require outside factors. It's no longer a matter of perfect execution, but also finding the mismatch, the defense fully committing to the misdirection, etc.
Examples of this in real life are air conditioners. Sure, you can get a modestly efficient one, but the very expensive ones in the EXACT SAME CONDITIONS are only slightly more efficient. In order to nearly double the efficiency, a host of conditions that have nothing to do with the unit must be met. We also see that with cars. The difference between a Camaro ZL1 and a Bugatti Chiron is plenty inside... but try to pull into a Wendy's with a Bugatti. Woops, that's $30k in damage to the front. At some point the COST of all that efficiency is a LIMIT on the conditions in which success is even achievable let alone reasonable to expect.
In order to allow this offense to truly be able to be successful even in less than optimal conditions, McVay must return some of the "wobble" to the offense which truly led to it being unpredictable. That will include a return to some concepts while also bringing in new or at least outside concepts. For example, I STILL can't believe that McVay didn't use ANY of the concepts that Belichick used when he had both Gronk and Hernandez. So many dime packages out there that as we've seen with Higbee and Everett separately, secondaries struggle with them. To not incorporate both of them in the 12 personnel sets was a mistake imho.
Anyway, TL;dr, McVay needs to ease up on the efficiency metric and focus on the success metric more. We get the failure if imperfect as is. Removing the success if imperfect options in retrospect was aiming too high, especially this year.
3) Burner WR. While Robert Woods (Not Van Jefferson) could take on that role, I truly think we need a WR who will force the overwatch to back up another 5 yards. When we had Brandin Cooks, guys knew you weren't gonna catch him if he got by you, so you had to stay over the top of him. This left what in the NFL is a square acre of land in the middle for Woods and Kupp to feast in. As well, when that extra safety is playing very deep, it's one less player to put in a box or short zone which helps the run game.
4) SOLID ILB. Kizer has had his moments and Reeder has as well, but the Jets picked on Reeder all day with those crossing patterns to the RB. We need a London Fletcher type or even a James Laurinaitis type who's a sure tackler, solid in filling the gap and not a total shitshow in covering those crossing routes.
5) SOLID+ Edge. I want Floyd to return even if Goff and AD have to restructure. If not, hopefully Floyd leaves for an obscene contract and Yannick Ngakoue decides to be a rental for that next contract. He'd be the best pass rusher of the 3 by far and can hold the edge. I know YN has had some sacks as of late, but apparently, it's not really working in Minny and while Floyd has put together a very solid year, YN has been spotty and that scheme doesn't really suit him. I could see us in what could be a down year for a lot of players YN taking the 1 year and parlaying that into a special contract.
I'm sure there are more needs, but if we had those 5, we'd see a resurgence of Goff, the return of our scoring and an even a better D than this year.
With those changes and good health, we're a Super Bowl team.