Should have, could have, would have. Well the OP and I were talking about a brand new diver. One that may have a problem sharing air in any event but at least with a standard hose they have a fighting chance of controlling the situation.
More importantly, the OP was talking about his daughter as his buddy...he has a much greater emotional commitment than the average new diver, to concentrate on buddy skills, and to be prepared to "control" his daughter's ascent if he found himself in an OOA share with her....far more likely, he will have practiced air shares with her using the long hose enough, so that it would be a zero stress event for her to take the long hose and buddy breath till dive end.
Sharing with the "standard" short hose, means that both will find their swimming efforts impaired by the body of the other--and this is stressful for new divers or old divers. Many new divers using nonsense like the Air2, will find bouyancy control hindered, if not dangerously difficult for the buddy team.
Back to the central issue, your long hose is a choice made so that you can donate to your "chosen buddy"..in this case his daughter. It has not been chosen so that you can handle OOA scenarios with people you have never seen or dived with before, and are not even diving with when the OOA occurs...this is not to say you would not help an OOA diver you come accross on a reef dive, but should such an event occur, it is not someting the "brand new diver" is trained for, since this diver could be the worst of the worst, and a major danger to both father and daughter as new divers---it would not be a threat to me, and perhaps you would not find this as a threat, but the interest of the OP was in how he could best protect his daughter as a dive buddy--not how he could help the worst "Never-Evers" that should never have been certified in the first place...and he should not be diving near people like this either.
As to West Palm Beach drift diving, I have done more drift dives off of Juno and Jupiter and Boynton than you could imagine. After many thousands of dives on charter boats, I have had to donate air to people buddied to other divers on multiple occaisions. I did this back in the 80's with single hose regs--no octopus used back then...in the 90's with the standard short hose octo of today, as well as Air 2 for a few months till I decided it was stupid if it had to be used ( but great and simple as long as you did not need it
And in the mid 90's and beyond when I began using the long hose, I found donating was so much easier, regardless of how bad the OOA diver was....
In the drift dives off of Juno, a typical OOA issue would occur in mini season or lobster season, and could be a new diver I was diving with ( in which case, they would not get below 700psi--I would see they were that low, and give them the long hose--then swim over to the other divers we were with, so everyone would know we were calling the dive. If I had 2000 to a new diver's 700psi, I might grab one more bug, then begin the slow circling ascent...but we would both be swimming, comfortably, both controling bouyancy from the 95 to 100 foot bottom, to the 10 foot stop depth. Both would continue circle swimming for stop, and then when we surfaced, he would be back to his own reg for getting on the boat.
Real buddys versus NEW DIVERS could be another thread. But for the OP in this thread, the daughter is his over-riding concern, and he should use the long hose with her, and do lots of practice with both air share, and peripherol awareness of each other, along with constant air monitoring of each other.