A couple of tidbits caught my eye. They may be old news, but this is the first time they've caught my attention:
The NASA Europa Jupiter Orbiter will carry 16GB of memory to record data during satellite flybys and observations of Jupiter. This memory does not need to be functional in Europa orbit (there's 1GB of radiation hardened memory for that). This means that substantial data could be returned from each satellite flyby.
The ESA Ganymede Jupiter Orbiter strawman instrument payload now includes a narrow angle camera. This would substantially increase the resolution of observations of Jupiter and Io (as well as increasing coverage of Europa and Ganymede). No details on the image system.
The following chart caught interested me. If budgets prevent flying a Jupiter Europa orbiter, a Jupiter orbiter conducting multiple satellite flybys would be a cheaper alternative. This chart hints at the science that could be returned (an actual flyby oriented mission would probably include more flybys of the outer moons and possibly Europa). The IPR is the Ice Penetrating Radar and LA is the Laser Altimeter.
Phil Horzempa had some interesting perspectives on the presentations and mission options that I thought I'd pass on: