The FIA need to review the rules in regards to pushing a competitor off the track IMO. I know it is against the rules but there seems to be an unwritten guideline depending on the outer track surface which the rules do not mention. If you push someone wide whilst defending and there is a run off area, it escapes the stewards review. If you do it and there is gravel, it clearly carries a 5 second penalty as we saw in Austria. They either decide it is enforceable all of the time or they amend the rules regarding outer track surfaces. The last race was sort of dampened by these interventions and it took the shine off what was developing into a good fight.