I think Holmes is one of the most underrated guards in the country, but I don't see her as a first round draft pick or WNBA player. Needs to work on her shot, but I think she's the type of PG that can help guide Mississippi State back to a Final Four since she'll get the ball to the right players and plays fantastic defense.
The comment about Howard getting long rebounds is true, and that's what really makes her and McCowan an intriguing tandem since McCowan gets every board that's within 5 feet of the basket. If you have McCowan cleaning up everything inside and Howard grabbing every long rebound....their rebounding abilities should compliment each other well. Both are also terrific offensive rebounders, so Mississippi State will get a lot of looks at the basket...they just need perimeter players who can score. Both of their numbers will go down a bit on the rebounding side of things. I expect Howard to be more efficient at Mississippi State and I'm guessing she's spent most of the offseason working on perimeter skills. Mississippi State is going to be a handful this year.
The only potential downside to this for Mississippi State is that 2019-20 is going to be another year where they lose a lot to graduation. I know they have AEH and Taylor coming, but they'll lose McCowan, Holmes and Howard who are likely their 3 best players this upcoming season. It's another deep draft for talent, so Notre Dame/UCONN/Louisville are all getting hit hard too, but thought it's worth mentioning.