Was there anything else? I think some had some suspected that the probabilities displayed on spells/saving throws were wrong.
I check from time to time whether the displayed hit percentage match the actual role difficulty. And so far, including advantages, they seem to display correctly. Not so sure on (spell) saving throws for monsters. I can't (or don't know how) examine the enemy's saving throw proficiencies. But when taking educated guesses, they seem to be alright.
I also advanced in the game some more and updated the google sheet. Had a couple of bad rolls for high percentage chances, which "tainted" the results (I am sure in the long run this will disappear again). But currently the 90-95 range only succeeds with a rate of 79%... The other high percentage ranges seem fine though. The low percent ranges are kinda fishy due to a low number of rolls. I might try to take some unfavorable attacks to get more rolls in the low percentage range in.