You have a great point, but for me it is still too much conjectures, but looking to theses conjectures I still disagree. Moving to another country would destroy those teams, cause they aren´t just the teams, Liverpool actually is a global brand but it is the Liverpool that plays in the premier league and have their rivalries, leaving UK would mean leaving all these parts of the brand behind. It is also a very different scenario, those teams in US move to other cities in the same country and still compete in the same tournament keeping a lot more of their previous brand.

For me your example would be much closer to MLB, NBA, NFL and MLS if you thought about Liverpool goint to Bristol, for example. In this scenario I can see better your point but I still think that the club would lose a lot of their capital and the brand would suffer with the ridicule of the situation for the average football fan. But it is just another opinion based in my previous opinions.