So forgetting all of the most recent completely lousy ass lectures (including the technical ones) in the thread about that stupid proposed real world's Culver Express trash and moving on, here are a couple of things that I think is worth looking into in the foreseeable future...
-Rehab of any poor conditioned stations.
-Transfer between the and at Broadway and Lorimer Street.
-Change the current structure layout upstairs in the mezzanine areas at stations that don't offer a free transfer between directions (meaning stations like the local ones north of Nostrand Avenue, not meaning stations like Nostrand Avenue/Fulton Street or 86th Street/Lexington Avenue).
-Make the local west of Myrtle Avenue-Broadway outside of the skip-stop service, to allow Jamaica/Nassau Street Line riders a direct transfer to the rather than changing to the or the .
-Make the full-length with the future R211 expansion order if possible, which can push off the R179s to the east for fleet expansion or service increases.
-Extend the to and from 179th Street to relieve 71st Avenue.
-Get rid of all the "local" announcements and change some minor announcements such as restoring the old "This is a Manhattan-bound train" announcement previously made by Chowdery.
-If that Culver Express crap fails and everything goes back to being completely local, the agency should look into extending the permanently to and from 18th Avenue, using the middle track at the station with diamond X switches between that station and Ditmas Avenue if possible. Or instead, just keep it at Church Avenue and the agency can go along with the most recent Culver Express proposal (posted in the other thread).
This is all I can think of for now.