As someone who has been in a UK-US relationship for 16 years and lives in the US, it's pretty heartbreaking what's happening before my eyes. For a while I saw definite benefits to moving to the UK (NHS, strong currency, better work-life balance, better quality of life and food, access to Europe, etc.) but I don't think any of these things are guaranteed anymore. I can't believe the direction things are headed.
Believe me, I've been desperate to find one reason why it makes more sense to live in the UK than the US, but right now I can't find a single one. Nothing about the UK is worth the stress of the immigration process, and the worries about arriving with zero credit, fewer job prospects and a severe cut in income. Sure, it's beautiful and charming in places, but it's not like you can enjoy that much when you can't make ends meet.
I'm sure it would be different if I didn't already have a settled life in the US and could come over with all my worldly possessions in a suitcase. In many ways, I wish I moved back years ago when I had less to worry about, and before they tightened up immigration laws.