As an EU citizen, I’m very conflicted about the UK just rejoining the European Union.
Your administration made the weird decision to lean on a marginal difference on a referendum, and left with a whole lot of fuss and customised paperwork. Who’s to say you won’t do it again?
While I do like a stronger Union, the UK will likely try to get back the position they had before (with all kinds of exceptions), but the only way the UK should be allowed to rejoin (in my opinion), should be with a full commitment, not just “we’re sort of joining but also not”.