During Star Wars Beta testing there were weekly (?) updates for the game. Will we be seeing similar updates for this?

That would be nice.

And since I did not partake in the Star Wars beta, could you tell me how much feedback actually was taking into shaping the game?

Honestly I just remember evey so often a doc was released that you could cut apart and tape or glue into your book. Each time the doc was added on to so by the end you had a full update.

They stated that they would release a email every two weeks for responses from the beta testers. Then they would release updates.

For Dark Heresy 2E they made quite significant changes based on player feedback.