https://mc776.neocities.org/dl/mdt.pk7
I've mentioned this patch elsewhere and figured I'd put it up here in case anyone else wanted some ideas or to just change up their game a bit.
It smooths out a few Doom quirks that I've never really liked or found justifiable (at least not in a freelooking modern port) while trying to keep the original degree of difficulty (zombiemen notwithstanding), while adding some new behaviour to make a few guns a bit less "click and drag the monster into the dead bin".
It should be compatible with autoaim though I've never tested it to any significant extent.
Full (more or less) list of changes in the readme.
(open the pk7 as a 7z)