I've run into situations with slide back cards ( specifically those with range where you can target a character at non cardinal or ordinal directions ) do not push the target into the expected square. This may be my lack of skill in geometry, however, it would be nice to be able to see where the target will be moved to prior to confirming the target. I envision that this would place the blue movement image with the correct facing when you have selected the spell and are mousing over a target, prior to having clicked on the target. This would allow players to make tactical decisions without having to try to figure out or guess which of the possible squares a target will be pushed to.
I think this is a very good idea. In many situations I too find it difficult to predict where the target will end up.