That doesn't really seem like a sensible transition. It should be the other way around, you do race stuff and then report to the larger faction for assignment to faction stuff, not faction stuff and then "You're a Night Elf so we're dismissing you across the entire world to go do whatever Night Elves are up to".
Besides the weird pseudo-segregation, it makes new players feel like Org/Stormwind are home and their own racial areas are an assignment, or like they're supposed to have an existing connection to a place they've never been or seen. None of this are the end of the world, but they're all awkward and it makes zero since to build an entire second area full of new assets when you could just build the tutorial zone into the first 10 levels of a racial starting area and not have the awkward back and forth.
Especially awkward for veterans, because you don't want to choose Elwynn and "learn" about the human faction you already know all about, you want a quick and streamlined experience which is what Exile's is, tutorial aspect notwithstanding.
Just doesn't make any sense imo.