Well, yeah. It was Tony who got Sam the gig (I've heard that Tony & Herbie both were drug - at the time - w/Coleman's more inside approach), & Tony was definitely feelin' Sam on this gig, as was Herbie. But Miles, I don't think was ready yet for Sam. Sam was loose, like you say, and I get the feeling that he was, shall we say, "underwhelmed" to be playing beside Miles.
The difference between Sam in this band & Wayne in this band is that with Sam, he came out and laid it all out, and that was that. With Wayne, there was always the sense that there was going to be something more to come (as there indeed would be). And for the way that Miles liked to present his bands (and his life in general...), that sense of more to come (vs. "this is it, deal with it") made Wayne the more fitting long-term choice.
But I love hearing Sam on this date. Miles is still playing in a faintly residual "Blackhawk" style (which was in itself a residual '50s style), & then Sam comes in and essentially says get the phuck outta my way with that shit.
Very disrespectful.