Don't Expect It To Be Perfect
If you've been playing Battlefront after the release of Outer Rim, you know that the DLC and its update caused problems.
EA DICE recently fixed a ton of these issues in a massive May Battlefront update but problems continue to linger on.
Engineers have likely been testing Bespin for a number of weeks now and they've probably wiped out a number of bugs. That said, problems always slip through the cracks and you can expect Bespin to deliver some problems of its own. It's inevitable.
If you don't want to deal with bugs and other in-game problems, wait a few hours to download or maybe wait a few days/weeks to buy/play the DLC.
Like Outer Rim, we expect EA DICE to deliver server-side hot fixes and client-side updates to address any issues that pop up after the Bespin DLC release. But those take time.
Don't expect a Bespin beta to help ahead of the public release either.