That will never happen. The MTA doesn’t like having 2 different services at 2 different times. (Which makes zero sense, since the MTA is always making route changes every weekend for other maintenance projects.) Either runs via 63rd at all times or runs via 63rd at all times.
The only change I can see being made is to make the local in Queens whenever the isn’t running, and to make the express in Queens on weekdays, but use the pre-2023 tunnel service. ( uses 63rd, uses 53rd). Since both local and express trains can use the Jamaica yard from 71st Av, it not really an issue in terms of yard assignment (unlike the , which needs a B division yard in Queens since 4th Av has no yard)