I pull my miles ticket children up to me (paid) in E+ all the time. Most agents by now do it easily, a few still claim it can not be done. HUCA.
If my upgrade clears, my kids stay in their E+ seat, they don't get moved which is great.
QUESTION: About to do this again. My plan is to book E+, call and get kids (mileage seats) moved next to me in E+. Once that is done, actually cancel my ticket and rebook it as a PP seat as I was planning to fly in PP TATL for this flight. You think kids will still be in their E+ seats they were moved to from earlier, or it'll be figured out and back they go? Any experiences with this?