Felix Jones "all over the place" is a good idea, as long as you are feeding him the rock in the running game, too. The safest path to victory is on the ground.
Marshall Faulk
Felix Jones should be used just like Faulk was for the Rams and Colts.
Look at Faulk's receptions/yards/TDs from 1994-2002:
1994: 52-522-1
1995: 56-475-3
1996: 65-428-0
1997: 47-471-1
1998: 86-908-4
1999: 87-1,048-5
2000: 81-830-8
2001: 83-765-9
2002: 80-537-2
1999-2002 was played in Mike Martz's offense; Garrett comes from this family of offensive minds. Faulk rushed for at least 1,000 yards in 7 out of 9 of these seasons (1994-2002).
The Cowboys should absolutely be able to use Felix Jones just like the Rams used Marshall Faulk.
You can feature Felix Jones in your offense. He's that good. It's up to the Cowboys to feed him the rock.
Losing him was a devastating blow, imo.