I've noticed this. Even thought they rather do a good job with what they provide, there is something odd. There are two things I can't get ride in my mind :
They plan a great overhaul.
They plan a new generation MMO.

SE is really but really really quiet about its two AAA licences they are working on. I more and more think they have a new MMO in the pipes (to be announced somewhere between the 6.0 and the 7.0 and beta released just after the 7.0... to encourage people to play both XD).