I'm taking tabloid reporting with a pinch of salt. It was widely publicised that Chelsea wanted Lukakau but I've not seen any evidence of a bid. The same might he said for United and Bakayoko.
I've read quite a few articles analysing Moratta and whilst it's true he hasn't banged in 20 a season year on year everything about his stats suggests he is capable.
Lukaka is a proven goal scorer, but the problems which Mourinhi highlighted when we sold him (in short his work ethic) remain.
Each have there merits, Morattonis more technically gifted, and a tireless worker for the team. Lukaka is goal machine able to impose himself sing his physical preference. But I'm happy with the purchase, seal the deal for Sandro and this makes for a great transfer period for Chelsea IMO.