Should be able to: don't read this Spoiler if you haven't seen Rogue One/don't want to know either way!
I think what was cool though was that pretty much anyone who heard and realised what they had said didn't plaster it over the internet - or if they did it wasn't widespread, as last year a major spoiler surfaced just after the premier and ruined part of TFA for a fair few people. As on a different forum i frequent (a lot more often than here nowadays) someone else had been there as well and picked up on it, but not mentioned it either. edit: considering it was a around 5 months to not say anything as well, damn impressive.
I think it was good they were only shown briefly, as they could have gone too far and made half the movie based around said character.