There are 3 problems with this comparison:
1. The LV are still working on being better team defenders. UConn has sort of had that in the bag for years. If you got blown by over the past 10 or so years you were met by Stewie, Or Dolson, or Stokes, or McLaren, or Charles. They have almost always had a rim protector up until recently. Someone who you knew would knock you on your a** if need be.
Russell is that sometimes but not all the time. More often than not she can easily be pulled away from the basket with a simple screen. Getting help side defense consistently is still hard for them I would say about 65% of the time. You can take risks when you know someone will be there. At this point I don't think the staff is willing to take that risk. However, I see what you are saying, they might as well since it's not like either of them are gonna be there next year.
2. It's sort of like comparing apples to oranges. The offense for both teams are structured completely different, especially in the half court set. UConn's offense is meant to be equal opportunity and Tennessee's isn't. You don't know who is going to be taking the shot for UConn at any given point. Tennessee's goes in a very specific pattern. Post player first, if not then look for a drive, if nothing else 3 or jumper.
3. I'm assuming you were referencing KML and again that is like comparing apples and oranges and I can understand why the staff wouldn't take the risk. KML broke the NCAA career 3 point shooting record. I'm pretty sure she was top 5 or so coming out of HS. I think she made over 400 by the time she graduated or close to it. Dunbar shoots 36% which when compared to the rest of her team really isn't much better than Jackson, Westbrook, or Davis.
If her only strength that they can capitalize on is shooting the 3, and it's only marginally better than someone who plays better defense, and also has other moves or skills, and the offense isn't even built for 3 pointers anyway then why play her? Now if she was shooting 45% or better from the 3 & had proven she could use her length to play in the post some or help out on trapping or pressing defense then I say give her the minutes but based on the decisions the staff has made regarding her minutes when healthy I would say they don't see the benefit in giving her more minutes because of her stats.