I don't know who will be replacing Klopp, but I'd be surprised if, after 6 months of FSG knowing Klopp was leaving, we don't have someone else lined up now.
It looks like we swung and failed for Alonso so we would have moved for our second choice. That might be Amorim, it might be someone else. The press seems to think Amorim.is our second choice, but there hasn't been any evidence that's who FSG want... He just seems to be the universally agreed best choice after Alonso so they presume that's who we are after.
For all we know, FSG is trying to bring Paul Jewel out of retirement. ( they're not... I'm Just making point that there is no evidence who they want to sign: Amorim links so far have had no weight to them)