One of the best things about the new weekend schedule is that it allows passengers transferring to/from Amtrak trains at CUS to have direct service, instead of having to walk over from LaSalle. Speaking of which, the new schedule does seem to compliment existing RI service pretty well, although I wonder if 862 really needs to run that early. Oh, and I wouldn't worry so much about the padding, after all, I can think of at least three locations where the potential for "freight train interference" delays is pretty high.
I agree that the extension of trains 815 & 830 to Manhattan was done to synchronize the weekday service with the Saturday schedule, but railfans (like me) will appreciate the move most of all, since it'll make round trips there and back a lot more convenient...
--Dorian--