When I first played Babel, I thought it was pretty difficult. I played the latest version, now it has become much more pleasant to play. Therefore, I briefly posted my opinion (First on the Old one, and below in the comments I wrote changes to the Latest version).
In Russian: https://doomguy.ru/community/topic/sovremennyj-vanilnyj-doom-novyj-vzglyad-na-kl...
However, I noticed that when I completely clear the Maps, it is not possible to complete them 100%. It seems that either this is connected with the Resurrection of Monsters by Archvile, or with their Summoning by him. The maxisum increases, but the empty remainder remains.