at least calc will. libreoffice calc cell datastructures are not suitable to offloading chunks of operations. once a rewrite is achieved (which is being thought about, should be worked upon soon), you could offload actions to gpu making things a lot faster.
About the ui though, I am not happy with the current state of things, since I hate menus. It creates the illusion of organization, even though a single menu has more than 15 items in it. That is crappy design, it is familiar, but crappy nevertheless.
I have been a linux user since a long time, but I do not hate everything Microsoft for the heck of it. I think ribbon ui, is a decent (eats screen estate.. bad) solution to organizational problem. Perhaps a Kate-sque approach would be good.