Most musicians - and fans alike - expect funk to have repeating bass lines - ostinatos. Miroslav's bass lines were funky, but he changed the all the time, no two bars are played exactly the same way, even on his funky Shepherd album pictured above. I have found out many people have difficulties relating to that concept of playing all variations of the bass riff - I find it thrilling. But many musicians have trouble keeping the groove when you start to play variations of funky stuff in the ryhthm section. Guess they have to watch out too much and have to keep up their own rhythmic senses, and cannot slip that easily into their trance-like state of mind they like to improvise in.
I love that concept of funk bass! I mean I also love a good ostinato if the bass player can groove it, but it gets really interesting once variations start, or if there is no real ostinato there. I just heard Kim Clarke two days ago, two hours of playing, and yes, she did a few simple licks here and there (obviously, as they were playing Hendrix compositions, see this thread), yet she did astonishing things, without EVER getting flashy (unlike all those Weather Report bassists who do get pretty flashy), and she HAS THE GROOVE! (Is Kim Clarke the Goddess of funk bass? I guess so...)
ubu