Thanks for all the thoughts. This morning I put a level across the saddle and the bars to see how things looked: the level was slightly higher at the bars --- this because I had put on a pretty high rise stem for her a few months ago. Given what has been said here, I'm thinking that a different touring frame actually might not do the trick. I mentioned a recumbent and she said no. The hybrid option is a good one and she could keep her Brooks saddle

She'd just have to give up drop bars, which in the end might be where she has to compromise.
Thanks for all your input.