With the changes in ore distribution players from all areas will want to venture into other regions and areas in which to mine. For example a high sec group into low, null or jspace, or a Null group wanting to day trip into a WH in order to collect ores.
Ore is bulky, and a Mobile Ore Compression Device could be the answer that small groups need to facilitate operations out side of their main area.
Acting in a smiliar way to a mobile depot. You would deploy the device into space and it would take a some time to Anchor. Then people could drop there ore into it and compress it so it need to be able to be used by a fleet maybe using the fleet hanger options liek you see of DSTs etc.
You could have certain stipulations like the device being over a certain m3 so that not all ships can carry it.
If attacked it would have a 2 day timer like the current mobile depots, but you could repair the device using Logi (meaning people would need to bring additional ships along to maintain the device.
EDIT:
Compressing as well as in a refinery may be too much, so perhaps the module would only compress at say 30% or 50% of the amount a refinery would do so it wouldnt bee so OP.