For the Stack Overflow site, when processing review queues, I would like to see more (all?) the possible SE sites listed, so that I can refer someone that has a Question that should be migrated to another SE site, to that site.
Currently the choices available are a hard-coded subset of what is available
I’d rather have a drop-down, that lists all the Stack Exchange choices available.
Some people ask about algorithm complexity, would want to be able to suggest the computer science SE site.
Some people ask about installing software on Linux and want to be able to suggest the question get migrated to unix.stackexchange.com
…and so on.