When Gerrard walked through the door at Ibrox there were only 3 players in the squad good enough to retain in Tav, Jack and Morelos but all 3 wanted to be part of the future of the club and were ready to fight for trophies. It also took 5 transfer windows for Gerrard to get the competitive squad he wanted.
I don't know who their new manager will be but a problem he has straight away is it appears the best players, the one's worth keeping, don't want to be there and aren't ready to fight for trophies. Their new manager will also need to have some succes rate in the transfer market to get them anywhere near us, and that's on the basis that we don't kick on to a better level again.
If we remain fully focused, and I believe we will be, we should be at least a couple of years ahead of them.