This would have been enough.
I was just capping this moment when I realised this. She looks at Regina, but she isn’t saying that line to Regina. She looks at her daughter, then she looks up and speaks.
She’s saying that line to Rumpel, the man whom she loved, the man who now lives because she will die, the man who is standing over them, the man who loved her once. She now knows what he knew then: this would have been enough.