zhtm475,
1) Yes, if those altitude constraints were a part of the original star. Any altitude restraint that had been inserted prior to the star will remain. Of interest it will also annoyingly erase any holding pattern you may have inserted even though the holding position is common on the star to the new runway.
2) Yes, but I'm not sure about 'expedite climb'. It is a mode I have very rarely used as I prefer 'selected speed', entering a lower target than managed.
Scince operating buses I've developed a considerable callous on the tip of my right forefinger!
The lack of the need to 'execute' an action having selected it (as per FMS) was not a good idea in my opinion.
Regards
Exeng