I don't think we'll have 6 total updates in a year after the rework. I suppose (and hope) that we can play at least two updates in Summer's Gone. I don't care too much for Wiab but it is true that developing two games at the same time slows down the process in general.
I know I was too optimistic, but yeah, 2 updates could work. I play both games and love them. About developing two games parallel: Yes, it is pain in the ass, but if you have a writer's block on one story, you can write on second one. Few developers do that. But, yes, developing process is slower.
Lucky that Ocean has two dedicated rendering machines, so they work probably most of the time.