Changed the top of your post to Evo 1.0.5 ... we’re a ways off from 1.5.
I don’t think it’s feasible unless you want to supply a fully tested patch of DocManager, the date pickers and lots of other things in the next few days. The next point release (1.1) is likely where any major structural or functional updates to the Manager would be made as long as they serve to bring Evo more in line with what’s happening in Revo. Feature additions have to be planned and implemented basically in parallel.
Honestly though, if we’re going to update the core Manager JS library, it would probably go to jQuery, getting rid of Mootools entirely in the core distribution.