I agree with Winter, I don't think he does enough to justify a starting spot at the moment, he needs to keep working on his game and may work better as an impact sub for now (Lewis in same position). Hopefully his injury isn't anything serious. One definitely does deserve more game time and is always a threat when on the park, probably our most confident striker at the moment.
I think it's a bit harsh on O'Hara as his work rate is always there, just not his best game in front of goal today. I think we will get goals from him but I agree with other posts that we need another striker for competition. Good thing for me at the moment is that the goals are spreading amongst the team which you need over the season.