@Dancfc wasn't just talking about losing Hazard though in his post that I replied. May be you should read both conversation first before guessing so you understand what is the Herrera thing I refer to.
If a team that finished 6th lost their your 2nd top scorer, it makes sense to actually add another goal scorer in the team.
I didn't avoid the question, I already gave you the answer, irrelevant to the topic.
How do you know that if Hazard stays at Chelsea in 19/20 wouldn't perform the same as Pulisic 19/20 or worse? The same with Martial & Lukaku. How do you know if Lukaku 19/20 wouldn't perform the same as Martial 19/20 if Lukaku stays at United?
If Hazard stays in 19/20, he could easily be considered as deadwood last season and Pulisic would have been considered as good replacement of Hazard's position and creativity in 19/20 while last season Abraham would have been considered as replacement Hazard's 18/19 goals product since he scored about the same amount.
''Pulisic'', Abraham and Martial improvement have to be given credit to manager's coaching and man management which not something we are discussing right now.