to reply to all of you in one.
Yes, shanks was the one to deal with him. But we don’t know how hard that fight was. Can be that the fight was as difficult to shanks as his fight with Kid. That panel do him striking the Adam tree, is not more impressive than Zoro tanking an attack from 2 yonkou’s. Is Loki’s potential high and can he reach Harald? Yes, do I think he is yonkou level? No!
But, I always like to wait before powerscaling when new characters are introduced. A lot of you like to always put them straight to the top.
I’ll wait before I judge his strength. So far neither Luffy, zoro or Sanji are scared of him or think he is a threat.