WHEN do you spend surges? Before defense is rolled? Or can you wait to spend them after the defense roll? Unless it's a special surge thing like "need one surge to hit shadow dragon". Right now we played spend when you want.. so if a hero surged he could wait to see what the defense is, and then if a heart would get through, choose stun.. etc.
Per the attack rules on page 11, rolling dice is step 2, checking range is step 3 and spending surges is step 4. So all surges are spent after dice are rolled.
Can Jane interrupt her feat for anything other than her built in attack. Can she interrupt it for the built in attack and two other attacks, then complete the move?
No. Firstly, you can only interrupt a Move Action and Jain's special ability is not a Move Action (it's a Special Action that happens to involve letting her move as part of its effect.)
Secondly, the special ability itself requires Jain to spend an action, so she definitely could not get in two other attacks, even if she could interrupt it (which she can't anyway.)
Can she open doors during her feat if she's thief and has the open door for no action ability?
This one is a bit sticky.
Once an action (any action) has been initiated, it must be resolved completely before another action can be initiated. However, with the Thief ability, opening doors is not an action.
Unfortunately, the word "ability" is not actually defined in the rules. It is used to refer to basically anything a player can "do," but whether or not an ability can be done in the middle of an action is not properly defined.
I'm inclined to say no, myself, because I want to limit the number of things that can be happening all at the same time, but there's definitely room to argue the other side if you're so inclined.
Can you stop her with a trap card that saps or ends the move action?
You can't use a trap that triggers "during a Move Action" because this ability is not a Move Action (as above.) However, you could use a trap that triggers upon "entering a space" because she's still doing that each time she moves.
When a group is given a tile with no specific spot to start in, can the OL place say a large monster so that some of it's mass is not on the tile as long as 1 or 2 of it's bits are on the required space? Or does it have to be placed entirely within the tile? Or rather can a shadow dragon straddle a tile connection as long as one or more of it's bits occupy squares in the required tile?
You must place the figure(s) entirely on the specified tile if it's possible to do so. If there's no room on the specified tile to fit all required figures, then the excess must be placed as close as legally possible.