I'm not exactly sure what to expect on this.  I don't think they're going to change the 90% to 85% on the face of the 2210 form / calculation, but it sounds like that's what you're expecting.  The information from Notice 2019-11 is fairly specific:

https://www.irs.gov/pub/irs-drop/n-19-11.pdf

"To request this waiver, an individual must file Form 2210, Underpayment of Estimated Tax by Individuals, Estates, and Trusts, with his or her 2018 income tax return. The form can be filed with a return filed electronically or on paper.  Taxpayers should complete Part I of Form 2210 and the worksheet included in the form instructions to determine if the waiver in this notice applies. If the waiver applies, check the waiver box (Part II, Box A) and include the statement “85% Waiver” with the return."

So, rather than change 90% to 85%, I think they need the checkbox (and if they're feeling generous, a worksheet that does the math for you and automatically checks the Part II Box A when applicable.)

I'm guessing this is just the normal ping-pong match with the IRS which is why this is delayed.  IRS released the notice on 1/16 (when most of their employees were still on their 5-week Christmas break) so their efile schema had to be updated and that info pushed out to the software vendors.  Then the software vendors have to update their programming and submit the updated forms to IRS and wait for approval.  In the grand scheme of things this year, I would certainly put "get 199A working" as a higher priority than "fix the 2210".  Folks who file a 2210 usually owe money so they're not looking to file by the end of January.

The charity thing though, ridiculous, no excuse.