I admit I am incredibly biased, being a huge UConn and Paige fan, but it seems to me that you're selling Paige very short. Not only does she lead the rookies in scoring, assists, and steals, but she is also top ten in the league in all of those categories, which none of the other guards on your list are (nor, I believe, is any other guard in the league).
Here are the statistical leaders through last night's games, according to ESPN:
Kelsey Plum is 3rd in scoring
Kelsey Mitchell is 4th
Sabrina is 5th
Paige is 6th
Allisha is 7th
Jackie is 11th
Soni is 17th
Burton is 32nd
Kelsey Plum is 3rd in assists
Sab is 5th
Burton is 7th
Paige is 8th
Jackie is 11th
Allisha is 16th
Mitchell is 22nd
Soni is 38th
Paige is 4th in steals
Sab is 12th
Jackie is 15th
Kelsey P. is 19th
Allisha is 25th
Soni is 27th
Burton is 29th
Mitchell is 45th
I think Soni is a tremendous player, and I realize it's become a popular narrative, especially since Slim was traded to Seattle, that she should be ROY, but neither the numbers nor the eye test support it. (In addition to the rankings above, the other stats show that Soni averages 4.3 rebounds a game and Paige 4.1; Paige averages 0.5 blocks a game and Sonia 0.3; and Paige averages 2.1 TOs per game and Soni 1.8, so it's not like Soni is blowing Paige away in the other categories.) And Paige has had to carry a heavier load as a first option on a worse team.
I know that basketball is not only about statistics, and that statistics don't tell the whole story, but I respectfully disagree that Paige isn't the clear ROTY.