NYC Transit Insider Tip?

We found the following in a thread on news on the F train rally. The commentor identified themselves as NYCT Insider.

Under News on F-Express Rally (received July 1)
Upon deliveries of additional R-160 cars enough R-46 equipment will become available for the F and G lines. Express service will become possible at that point. Service plan undecided at this early time. Most likely V extended to Church Avenue as the rush-hour local. G extended to Church in rush-hours also due to 4th Ave switches not available during rush times. Slight chance 18th Avenue may be used as turn back but new switch for this must be installed.

What does it all mean?!