Sorry I'm confused are you trying to say no player at all is better than a player still integrating? Klopp has done all his business really cheaply. If a player that would cost 50 million in the summer is available for 65 or even 75 in the winter I'm fine with paying the extra if it means that player is good to go from day 1 of next season. They may be useful here or there till end of season too which would be a benefit but you're getting them ready for all of next season not just half of it. Don't you see the benefit? If Keita and Fabinho had come last winter and were firing on all cylinders and fully integrated within the squad by the start of this season we would probably be doing even better by now. They're still not fully integrated now and it's making our season hiccup.
Work it out for yourself. All of the information is there!