We (DD12 and myself) have done both WDW and DLR many times. While 7 days isn't enough for us at WDW between the parks and waterparks, we find 4-5 days at DLR enough to do all of what we want at Disney proper, at a pretty relaxed pace - I think that amount of time will still be OK for us even with CL, we may just have to step up the pace a day or two. (Last time we went, by day 5 we were getting - gasp - a tiny bit bored!)
So when we go for a week, we always add days doing things like the San Diego Zoo (we make it a daytrip from Anaheim) or going to a beach. There's also Universal Studios, esp. if you like more thrill-ish rides. This year I'm trying to get tickets for a television show taping.
It helps that we drive to DLR, while we fly to WDW - having the car enables the other trips. There's lots to do in that area of Southern California - try venturing out a bit!
Oh - and if you have a little girl, you can spend at least half a day at the American Girl Store in L.A.! LOL