Well, the immediate feedback checking stable 091 is that there seems to still be no autoexplore and that'd be
incredibly nice to have
It's actually one of the biggest barriers of entry for me, at least, these days... after spending a lot of time playing RLs with the feature over the last few years, it's become
very painful to play ones that don't (somewhat literally, as I'm getting older and the wrists et al are not quite as tolerant of so many button presses as they were). So much more time (and more importantly, button presses) spent getting places, so much easier to fatfinger past something and nearly die (I actually just did that with a bee :V), just so much more attention having to be given to stuff that's really just sorta' uninteresting, or at least has very little actual interaction involved.
High level play it's a detriment, sure, but... well, I don't think most RL players are giving their A game at all times, and I know I just kinda' don't enjoy it anymore (beat DSCC, angband varient or two, Incursion a couple dozen times or more, etc., etc. M'content with what I've managed, ha) -- perfectly fine sacrificing a fair amount of optimal play for not having to press as many buttons or pay quite so much attention, hehe.
... basically, if it's not an intended feature, maybe consider it. Libtcod wise, I'm pretty sure there's a couple other RLs out there using the base that has it, if other implementations would help puzzle out how to fit it in... coulda' sworn at least BRogue has it, at least, and I'm fairly sure that was libtcod based to some degree.
E: Though I do get the mouse controls are supposed to fill in a fair amount of the functionality there... thing is, I'unno about other folks, but I really don't like using the mouse if it can be avoided. Among other things, this is a laptop with a touchpad, heh.
Other maybe ideas... if you've got difficulty modes, maybe consider adding a similar modifier for certain mechanics? Like, I'm pretty sure I'll end up cheat engining away the food/water clock at some point, just because it's a mechanic that violently irritates me, and it'd be nice to just... toggle it off. Haven't played enough to see what else it'd be a decent candidate for somethin' like that, but it's an idea to consider, perhaps.
E2: Also, ah. Is there some way to check character statistics and whatnot? I've apparently contracted a disease and I can't seem to puzzle out how to see... anything related to current effects, XP to level (or at least amount gained), etc., etc., etc.
E3: Also also, it'd be nice if the readme/help stuff was somewhere outside the game, too. Text file to open up, etc. Faster to alt-tab than press ? followed by appropriate options, heh. Right hand's on the numpad, et al.