I think because 4/5 of the OL isn't going anywhere, you need to really upgrade that 1 that is. The OL has been pretty bad overall this year, but is rounding into decent shape. I don't think Leno has been as bad as he's been portrayed in this thread. He's actually got a good pass blocking grade, and I don't have the numbers off hand, but I believe the Bears have their best numbers running to the left tackle.
Leno, Daniels, Whitehair, Bars/Coward, Massie is basically what the Bears have now. A good RG would make the OL potentially as good as we thought it was going to be coming into the year. And with QB, most of the WRs, and RBs being the same, this is the best way to improve this offense outside of people simply performing better.
TE- I said in the other thread, Burton will get another shot to be the lead TE. So, a drafted TE taking a year to develop isn't the worst thing. I'd rather get the most talented player possible, then in 2021, you cut Burton and have his money to spend on a potential compliment.
WR- I think you cut Gabriel, but I really think they're going to need to replace his speed. Ironically Marvin Hall would look good on next year's roster next to ARob, Wims, Miller, and Ridley. Patterson isn't a real WR. He's being used appropriately right now. I don't think Hall is on a roster right now.
RB- Ironically again, Kerrith Whyte would look good on next year's roster. They don't really need him this season (unless god forbid, Montgomery gets hurt). He looks damn good for the Steelers. Probably going to add another draft pick very late.
QB- 3 weeks ago, I would have said they needed a new QB. Now, they need a backup who if he does play, won't signify giving up on the season and is capable of catching lightning in a bottle for a few weeks like Tannehill has. Also needs to be relatively cheap. Case Keenum seems to perfectly fit the bill. A lot can change in the last 3 weeks though, so if Mitch can't keep it up, maybe need to use one of the 2nd rounders on a QB.