Yeah I do enjoy seeing the original maps updated but I guess in this case we will just have to analyze game play as it progresses. When it comes to the movements and pathways, I feel like it would be hard to replicate an older style of play because with the ability to make things more realistic comes the possible desire to want to update the movements and style etc. The play style of ET can be very dynamic and unrealistic (as can be newer games) but I would not want this idea of "upgrade" to end up leading to a change of Enemy Territory style overall.
In some of the later videos it actually shows them changing something as small as aiming ability and body physics when firing the guns, those smaller changes may lead to a whole new aiming platform compared to the standard kickback of fire in ET now. Who knows, not knocking the idea of ET2, maybe I am just worried and don't want to expect too much you know?