SG2 Hidden Movement Idea

I have an idea on SG2 hidden movement that I'd like folks' opinions on.

Currently the hidden movement rules say a Unit must stay in place and do
nothing in order to have hidden status. How about if units can move freely and
conduct all actions except direct fire while remaining hidden. As soon as any
unit crossed or came into the LOS of an enemy unit it would lose its hidden
status immediately. This way you could move around a bunch of squad "counters"
(with a few dummies) but your enemy wouldn't know if it was a dummy, militia,
or powered armor squad coming up his right flank. This system would also
prevent "leader hunting" where players go after the other player's leader(s).
One complaint I've gotten is that this idea would slow the game down. I think
it might actually speed it up a bit (or at least break even) because you
wouldn't have to move gobs of figures around until they actually came into
contact. It seems to be a quick and easy way to add a nice element of tactical
surprise to the game.

Well?

If you wanted to screw up the idea with more complexity you could even use the
EW rules and some kind of sighting chance to see if a hidden Unit in LOS of
the enemy really did get spotted or not.

Thanks,

Re Paul's Hidden movement;

We actually play a form of this now; written into the scenario will be the use
of dummy counters and LOS spotting. eg a recon force will place 4 counters (1
per squad) and 1d4 dummy counters on board. These are moved as individual
units until they come into LOS from an enemy unit. At this point if they are
in the open then they are turned over. If in cover the enemy need to do a
spotting attempt to observe what is there.

This does seem to speed things up a bit. We are yet to try the unit going back
to hidden status if it moves out of LOS. Trying to keep it simple.