Even though FCPX has been kind of a joke there are some things that it has that I would like to see. Premiere has it as well, although Adobe don't have it's own, but I would like to see DNxHD become resolution independent or at least go above 1080p in resolution.
ProRes is used widely but it's still not very open, windows users can't for example encode to it. DNxHD is much more open and free, but it's stuck in fixed resolutions.
I would like to see DNxHD become more free in terms of resolutions so that we could online 4K in media composer.
A kind of 185x at 4K (whatever that translates to).
With the new Pegasus RAID and thunderbolt it's quite possible for lesser systems to work at these resolutions without clogging the system.