I saw the "if it ain't broke" comment. I'd agree except I accidentally transitioned my son into a toddler bed. We had a toddler bed in his room for a while even though we continued to use the crib. He'd show interest by laying in the bed after baths and stuff. Well, my husband deployed and there was no way I'd transition him while I wasn't getting good rest to begin with. Soooo, my noisy neighbors caused me to get creative and move his crib away from the window. I switched the location of the crib with the toddler bed. When I tried to put him down in the crib that night, he cried! He wanted to be in the toddler bed. Imagine my surprise when that was all she wrote for the crib (except the one time I put him down for nap in the crib when he was sick and then he wanted back in, big mistake). I took the mattress and support out so it's only a shell of a crib (I can't take it apart and so it must stay until Daddy's home). So, I guess my advice it to consider one of the cheap beds you can just put in her room to see if she's interested. Leave it in there and let her get used to it. See what she thinks. Or, put her crib mattress on the floor and see her reaction to that.
If the potty training isn't going so well, give her a break. She may be getting frustrated. Try again later, you might be surprised!
Good luck with both! But, there's nothing wrong with her still being in her crib!! So, if it ain't broke and you're not worried, then don't fix it! :-)