Input?
That type of movement feels out of place for vanilla Xcom; the sort of suburban/rural combat typically featured doesn't feel as if it would involve much jumping between buildings.
Another use I can see for jumping is crossing gaps created in partially destroyed/burning buildings. Overall less necessary in vanilla, for sure.
Point is, with such a moveset in place you could allow for a much greater variety of missions. Ufo crashed in the alps, for example. Or terror missions in Manhattan. Or even an attack on an alien battleship, in flight.
I'd like it, but it might get a bit complicated.
I think I'll be able to integrate it into the UI just fine, and for anyone using the mouse for movement it'd be even easier since the pathfinding would automatically determine which of these actions is best and consider them if you've got the setting on. Moving by keyboard would still do each of these actions automatically given the context. All it does is open up more options, without adding any real complexity beyond the greater number of tactical options.
I can imagine X-COM with grappling gear scaling cliffs to get to a UFO in the Alps. Gusts of wind, alien gunfire, some of the rookies falling to their death...
Input?
I personally think the idea of parkour(!) soldiers is pretty sweet, but if it'll get in the way too much, to hold off on them for at least a little while.
If I had the amount of free time I used to, I would've just coded these all in less than a week and shown you the results
As is since I've got less time and this isn't an essential feature, I was curious to know how much people would want these now, or later.
Will continue to wait for more votes on this, though the general trend so far points toward postponement.