1) I only think armors should slow you a bit less (lol @gothic)... but I might be completely wrong.
2) Maybe true, but I just use 2 or 3 stacks when I fear loacking of ammo, and usually don't have thoses problems. Also, I got the bad habit to keep ammo boxes unused, "in case of need". Usually, I end the game with them...
My only usual exceptions are triple shotty box use in mortuaries, when I find Jackhammer, and cell packs for fast bosses with BFG.
About Inferno's asuras, I think they ARE doomish... a mancubus with shottys instead of rocket launchers doesn't seem wrong to me, and it keeps all the nice aspecs of a mancubus.
3) Fully agree. Also, I wonder why the mastermind doesn't fire bullets... but ok, let's continue waiting for 0.9.9.7
4) Indeed, all I like in this dungeon is the music... melee can be fun, but stomping a horde of demons is impossible/too hard when you're not melee, and just too easy when you are. Ability to nuke level is completely random, and the WORSE is... a single throwing knife (and some speed) are enough to clear the entire level damageless -.-
Note that again, Inferno's blood temple is a great improvement to this ! It even includes a warning message when entering (Too bad UC doesn't have one...)
5) Bad idea, imo. I always play YAAM, whatever difficulty or challenges I'm playing (well, I made a few exceptions for AoRA, or vaults without master's staff). I consider missing part of level & XP is rarely worth avoiding a few enemies.