Sharing my experience from today 3/6/2021. TurboTax Web 2020 appears to have fixed the original bug I had with long term held ESPP stock sale, additional compensation income, and correctly populating form 8949 with the cost basis adjustments. It worked for me just now if I let them calculate it from form 3922 data. I can see the additional compensation added and the adjusted cost basis. Still doesn't seem to work if I tell them I want to enter it myself.
