If you came up listening to Bone, you played their albums many many times so you get the timing of their flow and understand the lyrics. If you didn't, then you're gonna have trouble understanding Krayzie, Bizzy, and Flesh (post solo T.H.U.G.S. album). Layzie and Wish are pretty easy to understand. That being said, Big did not rap super fast on the song and he enunciates his words (that's a huge part of his flow), so you're gonna understand his verse more. With Bone, some of the members flow is more singy and based on the rhythm, which comes off as dope but then when doing that fast can be hard to understand for a casual fan who ain't into their stuff. It's no coincidence that when you hear them live, Wish is the best live performer, has the most powerful voice, and enunciates his words the clearest. His verse of Crossroads is the one EVERYBODY knows. He's also the worst one lyrically by a mile and has never come out with a solo album. That's why they work as a group.