More challenging monster AI and behaviors tie into both of these concepts you know, right?
Part of the reason it’s a good idea to get these two issues out of the way is because they are fundamental both the ‘options’ available to monsters (for instance, there’s no such thing as proper flying right now, or actually jumping or wall crawling monsters because those abilities are currently just hacky ways of ignoring floor tiles) as well as NPCs AND monsters actually utilizing those options is a useful manner (consider pack based flanking for wolves and certain mutants, ambush zones being set up by giant spiders, ect.)
Improved NPC AI would be easily applicable to improved monster AI.
Imagine, if AI were simply capable of using vehicles…
Utilizing that improvement alone you could make an AI entity called ’ massive brain’ and make it spawn in a ‘vehicle’ made of flesh, bone, and horrible, pulsing alien organs.
add Z-levels and you have a true titan striding through your town knocking over buildings and soaking up infinite bullets from your pathetic 9mm skrubgun and…
boom
Oh shit! it’s coming through the wall, IT FOUND A GAP IN THE MINES! IT’S HANDS ARE MADE OF FRACTAL TEETH CHAINSAWS AND THE HEAD IS A CYBERNETIC FLAMING EYE! UNPACK THE LAW! PRESS F FUCKA, PRESS F! BITCH THIS AIN’T A CUTSCENE PRESS F! STOP MANAGING INVENTORY! STOP INSPECTING THAT LIGHTER YOU DON’T GOT TIME SMOKE A BOWL! PRESS F!