Now I've thought about this but I haven't tested it or really finalised anything.
I've couldn't help notice that all but 2 stats have a stat bonus, well i was thinking, that for mooks we just use the stat bonus and a D10 only system.
They obviously aren't same percentages, we loose up to 9 points rounding down. Degrees of success and failures are taken in 1's. 1's always a success, 10 is always a failure. Every +/- 10 bonus/penalty is a +/-1 bonus penalty.
If you want jams etc then 50% of 10's are jams (6+ on second d10, just a 9 for reliable weapons).
They still have all the stats for opposed tests. Best thing is group can all fire at the same time, can all test to dodge, toughness, or agility against flamers at the same time.
Not looked at the hit diagram, that might be a issue to resolve.