No one said anything about treating Pep as a stepping stone, far from it. That said if Pep doesn't leave a strong team for the next manager, we'll all consider it to be a bit of a failure in part. We've seen what short term planning did at Trafford, Whisky Nose fucked them over royally chasing the last few trophies with old players and left them in a complete mess.I'm sure the strategy is to win the CL sooner than later and to provide Pep with sufficiently good signings to do it while he is still here. He might fail to win it but we won't treat him as a stepping stone whose task is to leave a strong team for the next manager. We will sign a ready made CB, not one with bags of potential who may or may not come good in 2-3 years. And among those who have enough CL experience and are quick, Koulibaly is regarded as one of the best. I don't know whether and how much we want Koulibaly. But I can see why we may be after him.
Of course we want to win it sooner rather than later, that's just bloody obvious but we won't suddenly change the transfer strategy which has brought us from nothing effectively to becoming the most dominant team in the country over the last 10 years over a panic buy (which is what Koulibaly would be if the club followed some posters advice to just "give them the money, stop haggling about the price and get it done" on here).