KU's track programs have had on again, off again success. The womens basketball program had a solid run of success under Washington for a while, but none really since she left. Baseball has had some good years. Women's volleyball has been particularly strong the last few years.
The key to minor sport success is high quality coaching. Because you don't have the recruiting budget to recruit far and wide, you have to really have a strong overall program. KU is at a bit of a disadvantage compared to other programs because the local area does not produce a surplus of D1 athletes in minor sports like soccer, track, baseball, softball, etc. This is why you see SEC, ACC and Pac-12 schools excel in minor sports (as well as schools like Texas and OU). The local area produces enough of a surplus of D1 performers in those sports that a school like UCLA can have their pick of great HS volleyball players locally without having to recruit nationally.
KU doesn't have that luxury because the state of Kansas (and the four state region of KS, MO, IA, and NE) does not produce an outright surplus of D1 talent in many of these sports. The smaller population in Kansas also makes that more difficult.
You will notice that KU has had quite a bit of turnover in coaching in several minor sports. That's indicative of the issue with needing to find the right coach. It looks like volleyball has done that. If one or two other minor sports do the same (soccer? womens hoops? track?) that can help, but many of those minor sports aren't hugely popular locally like say, lacrosse is in New England, or like baseball and softball are in the gulf coast and sun belt.