Hi TheOAP -
Yes, I read Rachel Heller's account with interest. I think it's not surprising that she and I had very different feelings about renouncing. She describes her continuing attachment to the US, and to her identity as an American. Whereas I'm much more attached to Britain, having lived here for most of my adult life, and having all my closest associations here.
I do sympathise with the sadness felt by US citizens like Rachel who grieve over their loss of citizenship. It's an own goal for the US, to have created a situation in which so many devoted Americans (who would otherwise be America's best overseas advocates) feel they can no longer cope with the pointless, seemingly punitive, form-filling demands. Fair enough for the U.S. to say to someone like me "Fill in these pointless tax forms if you want to remain a citizen" - America and I haven't been an item for fifty years. But to treat devoted citizens like Rachel Heller the same way is not only unfair but surely unwise. What goes around, comes around.