Ignoring for the moment the need to get them there and brake into Saturn orbit to deploy them (again, not a wild future capability), I envision them being released into the rings to randomly drift around and return as much data as they can. They could be kept unpowered until their arrival, like Huygens was with Titan. We could have different probes with different sensors.

Random drifting can't return as much valuable info as purposeful trajectories (such as Cassini's). Remember the rings are highly structured and very fine tuned .. but at the individual chunky level they are (I think) pretty much dirty ice. Random movements between individual pieces wouldn't give as much new info in this case - we need the big picture, close up, but not too close IMO.

You may be conflating this with another idea - a very good one - of dropping a lot of balloon probes into the lower Martian atmosphere and letting THOSE drift about randomly .. now that would be interesting .. but unlikely. Look at the MRO mission now on its way - the future trajectories are clearly and strictly defined. NASA doesn't think random movements are cost effective in spåce exploration. - they're surely correct.

It will only be later that the probes will be given new software to link up and become vast Artilects which will take apart the Sol system and turn it into an immense Dyson Shell to better communicate with the ETI Matroishka Brains throughout the Galaxy.

This is a confident and firm prediction I take it ..
;)