Re: Why go totally F-35?
It may be able to do that when it has no stores, but put a few bombs on it and its range beyond the bow will be measured in metres
The Ruskies solved this by air-to-air refuelling. They have expensive "buddy" fighters converted to this role, which also have to be carrier launched and have limited range. Besides this is a moot point, since the QE class has a straight flight deck with a ski-jump, so it can only operate V/STOL aircraft at present.
However it's generally impossible to operate the catapults and have the landing area clear at the same time as they overlap, I think the latest US carrier might be the first to allow that by some careful re-positioning of parts.
Nimitz carriers have catapults on both the foredeck and the landing deck. See http://www.gettyimages.co.uk/detail/news-photo/x/556638285