I have a lot of thoughts about KLS, as she is one of my favorite huskies to ever don the husky uniform. I agree, as a sophomore she seemed to be on track to be a NPOY candidate. Even as a junior, I thought she was right there with (I believe) Aja Wilson. I recall watching her absolutely torch Louisville in Gampel. It seems like her shooting has never been the same since that infamous ankle injury.
That being said, I think there are definitely players who fit systems really well. Samuelson was that at Uconn. She is a great passer, has the ability to handle the ball, and rarely turns the ball over. Those are qualities that will allow you to excel at Uconn. She also was an above average outside shooter, and had the length to get to the midrange/basket against college level talent. Thats a bigger ask in the WNBA.
I can't recall Geno specifically saying she didn't have a killer mentality, but I do remember that sentiment constantly brought up on this board. I never fully agreed. She scored 20 second half points against ND in her final collegiate game, played through the flu to hold off Maryland as a sophomore, came up big down in Texas, and against Louisville in the elite eight, she nearly single handedly punched our ticket to the final four. She was a big part of what kept Connecticut relevant in the years between Stewart and Bueckers. Could she have done more, probably, but she certainly was a great college player. Not as clutch as a Diana, but someone I'm glad came to Uconn.
In the W, she has struggled. I think it all stems from the inability to get her shot off in one v one situations. If the outside shot isn't falling, it's going to be hard for her to be productive offensively since that is her best option. Reminds me of KML, honestly. I think you are absolutely correct, she needs to be more aggressive offensively. But I do see her being a role player in the W for many years. On Seattle she isn't needed to be a 15ppg scorer and third option. She's #4/5 in terms of options, so I'd just like to see her play solid defense, make the right passes, and knock down open looks. She does that and she might be on her way to a championship ring.