Lukaku is a good player but the EPL is not a friendly enough league for this player, how many clubs has he been to and only at Everton did he play well but for big teams like Chelsea and Manchester United he can't do much there.
His vision of the game doesn't really match Liverpool, why should it be forced, even though in this case Liverpool still have many options for attackers but I don't think Klopp will make a choice for him, especially for Nunez, soon the contract talks will be completed.
I think Lukaku still can exist on Primer League because he was success before with Everton, I don't see difficult faced by Lukaku with Primer League but also he not get good touch with Thomas Tuchel as manager for Chelsea. He ask to Chelsea manager try to go back to Inter Milan next season but not have any respond from Inter Milan to buy back Lukaku after not really good performance on this season. We need waiting second season Lukaku on Primer League and see how most active contribution for Chelsea, will scoring many goals in next season or keep still with drop performance from Lukaku.