There are serious obstacles to building all of that custom interface stuff with CF from a purely player driven side.

Specifically with mapping, I believe those muds use MXP or MCCP to pass stuff like the VNUM of the room you are in, which alleviates a *ton* of problems for automapping.

For instance, without that, you must guess whether you are in a "new" room or one you have already mapped. To do that, you can compare the Room Name, but those aren't unique. So you compare that and exits... and room description... and you still don't know with 100% certainty whether you are in room VNUM 101 or 102 that just happens to have all of those in common. And so it falls back on the person doing the mapping.

Once you've got the map put together, you've still got issues detecting actual movement, forced movement, random directions (like fleeing) and a multitude of other things that go away if you have definitive information from the server about where your character is, but the Staff (Umi at least) has stated that kind of info will never be available, so... yea. Without it, you can have an OK map, but not one that doesn't require a lot of human interaction.

Personally I'd love to see something like this: https://www.genesismud.org/play/ which has enough of that interface stuff + mapping to get by, but also is in a web client that is super accessible. The mud isn't one I'd want to play, but from first glance it seems they are getting some things right. The other nice thing is that by controlling the client, you can pass info for the client to have that you don't necessarily want the player to have.