Oh, I totally agree that they add character development - they're not bad scenes by any stretch of the imagination. They just kill the pacing of the film. Badly. They just don't work in the larger context of the film as a whole.
I'm all for seeing the scenes properly restored, but I don't think inserting them into the film itself in any form would improve it at all.
I also feel the Biggs scene on Yavin IV doesn't belong, especially in its SE-truncated form, but not for the same reason. It just doesn't work very well with the other Biggs scenes removed - it doesn't hurt the pacing of the film too badly, but without the proper context of the Anchorhead scenes, it just feels out of place.