I kind of feel like I am by myself in this thought, but here goes...
We have done
DCL,
RCCL, Carnival, and the Big Red Boat (Premier). Premier is gone, will NEVER do Carnival again, liked RCCL well enough (room was like a closet--and it was a deluxe oceanview, food OK, shows fair, activities OK, too much smoke in casino for our liking). For my family, DCL was the most fun, the most relaxation, and the most enjoyed. Our kids opted to skip a WDW vacation in a year, and chose to wait the year to do DCL again. After cruising on DCL, they were not interested in RCCL, and they are "typical" boys (13,11,8).
The money we would have saved would have resulted in a different itinerary than we want (fixed vacation week because I'm a teacher), and wasn't anywhere near $3000 -- (more like $500) especailly with a room of the same square footage. Keep in mind that I am comparing pricing with the rates we got after we rebooked on DCL with 10% discount and $400 stateroom credit-2 rooms.
I guess what I am trying to say is it is a decision to be made by individual families. For us, and maybe we are in the minority, but for right now, DCL is well worth it for us. PLease don't take this as negative attitude toward others who have gone over to other lines. I certainly respect your decisions and your reasons for leaving DCL. I have just been watching these boards and feel like I want to put my 2 cents into the pot.