OK, I suppose you're benefitting from the later wake up, but I wonder if she's just too overtired by that time.
Not sure about dropping the nap- I can't remember when DS did this - but then again his naps have always been fairly dreadful. Some aim for a nap between the hours of 11am-1pm.
The reason I say about doing whatever works for now, is that if she is in the middle of a regression then it's a hard time to get her to learn to self settle. But up to you- as you say, you have to do it at some point.
I never in a million years imagined that I would resort to controlled crying with my DS, I'd always hated it. However, he catches on to new things really quickly so after two nights he is a lot better at going down in his cot. Once I'd got over the fact that he wasn't crying because he was anxious or hurt (teeth have been a problem), it was a lot easier to do. He was in fact just (understandably) cross at being left.
Now we're all happier- DH and I are getting more sleep and so is DS as I'm sure he wasn't sleeping well in our bed. We were all getting disturbed and I usually ended up sleeping on the edge of the bed and having aching bones in the morning.
Another thing we did just out of chance was to put a musical lamb in his bed. We'd had it for ages, but never used it. The other night he woke about 10.30pm, I gave him some water, wound up the lamb and he settled straight back down in his cot. I nearly fainted.
.
Oh and he still bfs twice a day, but not in the night.