To tell the truth I don't understand the "why" of filming so far ahead. Yes, their income was drastically reduced, but they have reduced cast, cut the sets, no longer shoot on location. Cast have taken pay cuts, as has backstage crew. Originally, I had thought they wanted to play it safe, in case of a writers' strike again, so they would be able to stay on the air with new episodes. But then they were maybe 3 months ahead. This has gotten ridiculous.
Currently, the cast seems to take turns not being seen for a couple of weeks. Rafe goes to help out Sami with Johnny, Jennifer goes to visit Abby & Chad, Maggie/Kate just are not seen, John vanishes, tho we see Marlena. (this may be due to how this headwriter fashions storylines, and how they deal with the appearance guarantees).
Heck, this is why no one has a home anymore, everyone lives in a hotel room, and the square is everyone's meeting and workplace. Also, whereas no cast member has 3 or 4 year contracts anymore, they only get 1 year, or less!