The tunnels are tubular, and 5 feet in diameter. Some of you have to stoop a bit to move around in them, but no, I am not imposing any speed penalties.
There seems to be a discrepancy in your latest post. The party is not in the 'forest' room, but still in the tunnel to the east. Flannad went south through the tunnel to scout the room there when he disappeared. So, I am assuming that is the direction you meant to go.
For the present combat, I wanted to try somethning a little different, just as an experiment. Let's run this fight without a combat map.
Express move actions in the abstract, offering a motive. (i.e., 'Arak attempts to move into position to flank the first skulk'; 'Dowlee steps back to get a clearer shot with her bow', etc.)
One of the things I don't like about 3rd Edition is the tactical combat. I think it bogs things down needlessly. I would like to develop an alternative means of handling combats in the PbP format if possible. Obviously, we will need to consider how to handle things like Attacks of Opportunity. So, it's a work in progress.
And, it will require lots of conditions and options in your combat posts. (If the enemy is within range, do X. If not, do Y. That kind of thing.)
Not a big issue for me, as Flannad is not much of a combatant. But I could see how it could be an issue for the more warrior-oriented types. Personally, I prefer the maps. But I can work without them easily enough.