I had mine removed at 37 after repeated bouts of quinsy (abscesses on tonsils) rendered them nothing better than flaps of permanently infected scar tissue which could not be penetrated by antibiotics.
The recovery time was rough and took about a month, much of that with badly affected tastebuds as well as the painful throat (food smelled wonderful but tasted awful).
I was advised to eat normally where possible, and I do think it helped even though it was like trying to swallow barbed wire at first. I did that, but also had handy a little of what I fancied to soothe things, even if that was ice-cream as they no longer advise.
Use the painkillers well too. People think it is a minor procedure and all fine and dandy within a couple of days, but as this thread shows, not true necessarily, and there are many variables.
I would say to your daughter that although my recovery was rough and painful, I still think that having the operation was one of the best decisions I ever made. I have had no trouble at all with my throat since, and I am almost 52 now, so 15 years on. I don't miss those pesky tonsils at all. They had become the problem instead of preventing it. It sounds like your daughter was also in that position.