For the removing rest issue, please check this to see that removing rests is not a good solution for all cases: Hiding rests and hiding rest-dots - #12 by Coe
Regarding Finale or Sibelius, one shoud remember that Dorico is a quite new notation software that is in the market with those 2. Therefore, “ignoring” the needs of Finale and Sibelius users wouldn’t be positive marketing decision by Steinberg. Of course, this doesn’t mean we should expect Dorico to work as Finale or Sibelius (and indeed we appreciate much of the stuff Dorico does much better than those 2) but Dorico’s management should have these needs in mind. Otherwise, it would be like the company didn’t want Finale or Sibelius users to migrate to Dorico.