First let me say that I think you've done a great job on LH.

2 things I've noticed.

1) When attacking cities - the monument in the main square allows units to pass thru it.  However if your movement points leave you in one of the squares used by the building graphics, your unit is hidden.  If you can't get the building to go transparent or highlight unit in red, I think it would be better to make the building squares impassable.

2) In tactical combat, when attacking the enemy, any of your units which are also adjacent to the enemy unit being attacked also go thru their attack animations.  I don't remember this happening in FE.  Don't know if this was planned, but it really looks unnatural.