Not at all unreasonable to want one text to say whether she would be home or not. I have a 24 year old, a 20 year old and a 16 year old, so right in the thick of that age group.
Eldest daughter does not live at home. Younger two do. That said, my current 20 year old seems to be of the ilk that never wants to go out except for college and work, whereas the eldest and the youngest are more like social butterflies, at least some of the time.
I think I will have more of an issue when my 16 year old gets to that age, as she is a flibbertigibbet, forgetful and lives totally in the moment.
Throwing her out is a very big gun to fire, though I understand the temptation when you have been worried all night. She's going to uni in a fairly short time. Keep your relationship on an even keel.
A child leaving for uni is hard as a parent. So try to be calm now and do nothing that will wreck your last few weeks with her living permanently at home. Apart from uni holidays, of course. You don't want to look back and wish you had acted differently.
Yes, she should text. I would worry too. She was thoughtless not to. Perhaps Marinamarinara has made a good point about your DD reacting to her previous assault? My 16 year old has mental health issues (not assault) and I think I can well imagine such a reaction from her, even if she wasn't aware of what she was actually doing.