Actually, if you watch them play (particularly last night), Morgan plays closer to the basket than Stewie on offense most of the time. On defense, it's true that Stewie is closest to the basket to block shots as the last line of defense.
I agree with those who say that the four returning 2014-15 starters are near-locks to remain starters next year, and that the 5th position could be any of those mentioned (Butler, Williams, KLS, or Collier). My hunch is that unless one of the freshmen really distinguishes herself, Butler or Williams will have the inside track based on their year of experience and knowledge of the UConn offense and defense.
I think Gabby has to develop at least a mid-range jump shot, and she certainly has to become a reliable free throw shooter, before she can expect to start. Even then, it will be hard for her to play against teams with bigs who are both talented and over 6-3. If she improves in those two areas, however, I think she will probably be the 5th starter. On the other hand, if Butler proves that (unlike Kiah) she can be productive at both ends of the court, she will certainly deserve consideration.
A "second team" of (hypothetically) Boykin, Collier, Samuelson, Ekmark, and Chong would be more formidable than some Top-50 team's starting lineup. They might see a lot of action given how many utterly non-competitive games UConn will have next year.