I have to say I'm very excited about this game. It appears to be the type of CRPG I and my table-top friends have been desiring for over 30 years!
In terms of traversal and exploration are you thinking of including things such as pits to leap over, traps and natural hazards to dodge, use of equipment such as ropes etc? Making the dungeon more challenging to actually navigate? For example one character having to activate mechanisms in one part of the dungeon to allow the other three to move forward etc or a rogue character having to physically climb a cliff face to attach a rope at the top for the less dextrous to use, that sort of thing.
Our group has always thought that this aspect of dungeon delving was lacking, especially in tactical turn based 'overhead' CRPG's and the thought of these mechanisms being included in this game is very exciting.
Really looking forward to more information.