It would probably be a good idea for a Roadmap page to be added to the main TomeNET website along the top with the rest---people are more likely to try/start and come back after absence if there is a sign of plans in motion that can be discussed while seeing it all fall into place. Did you ever spend any time with Portralis tangar, both before the now stalled rewrite and after? It was strong on the quest/narrative front compared to almost all of the Angband/Moria descendants.
The U/I, aesthetics, ease of control/use updates, sound/music improvements, an "offline mode" as I mention above for crisis situations where online servers can't/won't work or preference, a strong focus on the early game foundations---I am sure all of these things can continue to improve and grow the player base. The most important first step, to not become WoW or UO or other such projects is already taken care of---which is huge because that tends to be what dooms other projects to have nowhere near this lifespan or personality needed to carve out their own legend and legacy.