'Tis gone now. I play this instrument occasionally, and there is now a Swell to Choir coupler.
The Oboe and Clarinet are gone as well. There's nothing I would want to play on the swell that would want the choir coupled to it while accompanying on the choir - about the only use I can imagine for it at the moment. The swell to choir now there enables some beautiful sounds in the quieter registers.
I'll have to submit an update.