All seems pretty fair, I agree that Lowry/Rozier can both probably be gotten without a 1st. Heat definitely don't want to get worse this season, but with Kennard/Jackson/etc coming back I could see them think that is comparable enough to get off of Lowry's 30 million fully guaranteed money next season.
I don't think Conley gets better value than Wall/Kennard/one 2nd, but I agree its probably not worth it. If we are making a bunch of trades to sink then I might do it, but if we are stuck as a .500 quality team with play-in potential then I will ride out the further Conley-aided development of Lauri/Kessler.