Ok the title is a bit of a lie but does convey what would be nice to see. As it's obvious to see reapers have a huge problem with pathfinding especially in terror missions with many 1 tile wide pathways being un-accessible for reapers.
What I am wondering if it is possible is to treat certain tiles as walkable by reapers, the tiles I have in my mind are tall hedges, as reapers should be strong enough to brush the hedge aside instead of needing to destroy it first, and fences (picket, and farmer fence) and small hedges as the reaper should be able to just walk over it easily.
I think this would make reapers a credible threat in the game, although it would make farmland terror ship crashes more terrifying as reapers could just walk through a hedge to attack your troops.
Also it could be possible for sectopods but those bastards don't really need any bonuses, and cyberdiscs obviously can just float away.
Reapers are the most pathetic unit in the game because of it's pathfinding trouble, I don't think I have ever been hit by one except on purpose just to see what happens, even silacoids do more damage to me (though not by much).
So anyway if it's possible to make a certain unit ignore certain terrain then it would definitely suit the reaper.