I can't imagine a better place for them to do this than my (well I haven't been in months, so I guess now it's my wife's) congregation. They meet in a 2-auditorium KH with 5 congregations. When the CO comes to a congregation that normally meets on thursday, they already cram two congregations into one auditorium instead of changing the midweek meeting for the tuesday-nighters to a different night. It's a little full, and I know a number of JWs that intentionally skip those nights because it's uncomfortable, but they all fit just fine. I can easily see them dividing one congregation among the others and taking on the two congregations from a (recently remodeled) KH that's about 10 minutes away. That little shell game would leave them with 6 congregations meeting in the double auditorium hall (they were doing that at one time a few years ago) and sell off the KH that they just got finished fixing up on the congregation's dime.
Actually, if they do this right and divide up the congregations that are getting reassigned to new halls slowly and evenly distribute them among the surrounding congregations that aren't moving halls they'll even leave most of the R/F with a vague impression of growth. They'll notice that the KH is more full, but won't look around and realize that everyone's been a JW for 20-30 years and just got reassigned. Only the ones that actually have to change their routine will really notice anything, and most of them will probably think "wow this new congregation that we moved to sure is full, they must be growing quickly."
From their letter, it seems to me that they know exactly what they're trying to do - manage decline while selling it as growth. They start of talking about all the growth, but spend the entire rest of the letter talking about consolidation. I so hope they do this in my area, as my wife will likely be missing a lot more meetings if they add 20-30% more people to her congregation's roster.
