2022 Mars Orbiter, For telecommunication relay Options

[Explorer1]

Not sure where else to post this (didn't want to make a new topic): - Probably does warrant a new topic for this mission - Mod

http://spacenews.com/nasa-eyes-new-mars-orbiter-for-2022/

An Odyssey replacement for the window after the 2020 rover; but what sort of science package would be a good balance, since this isn't pure telecoms like the old cancelled MTO?
Deimos would be a good place to orbit, far enough away for high latitude coverage, and easily reachable with ion engines, as is being proposed.