Since I have not yet been able to pick up the conquest pack, I was wondering if Titans can move in formation(Trolls escorting the Living Ballista), how the titans move(like Multi Dial figs or regular, I am guessing regular) and if there is any adjustment to sneak attack so that it isn't completely useless except against uniques and finnally, are there any other adjustments to other special abilites?

First the easy ones, Sneak Attack still works the same, but all Non Unique figures have a 360 Arc so its useless against all figures but Uniques & LE's.

Titans cannot move in formation.

Siege Engines(and Titans in General it seems) can do a double move per turn if it wishes, or it can do a move fire. So with a 4" Move it can move 8", or it can move 4" and then fire. Your still only giving the figure 1 action token per turn, so on your second turn if you wish to move the Titan again you can, but after the first move of the turn(say your first 4" move) you must then assign the push damage, but after that you can then do your 2nd move or fire. 3rd turn it has to rest like regular MK figures.

It's worth noting that none of the siege engines have a rear arc, and are therefore immune to the double-damage side of Sneak Attack even in regular Rebellion games.

Jeeze... i didn't notice the non-existant back arc, but it seems you are right. Very useful...