The low replayability compared to roguelikes is another problem.
Dunno about that, i cant count all the times i played Wiz8, for example...
You cannot really play your own CRPG, because you know every inch of the world, what will happen if you do this or that.. totally kills the enjoyment for me.
You never know what might turn up. Classical example is invention of rocket jump by players, back in Quake1, id guys had no idea it was possible.
On another note, there is Kornel, who says he never actually finished DooMRL, and some effects he didnt expect turned up.
1 - flat world, ie, the overlandmap etc contains the towns, rather than you walking onto 1 tile, which explodes into a town map?
I dont know why people love that so much, its really a pain in any RPG, having to check all those houses. Well, i guess it depends on your focus, maybe there is a game somewhere the whole point of which is going from one house to another, lol.
Personally, i prefer how it was done in Darklands, town is represented by a menu system, you quickly find and do what you had to do in a town, and go about your adventuring business elsewhere. Efficient, very much so, and not really detrimental to the game atmosphere.