Look at it in a slightly different way - we may have only done 6% of strikes, but when you consider how the campaign is being fought, it is as much about providing presence to support our allies on the ground through close air support.
If there is nothing to attack when our aircraft are in the air, then there's not much we can do about that. We could have 300 aircraft constantly over the skies, but if there isn't a credible target to engage, then they still wouldnt make a difference.
We are falling into the trap of focusing on one metric (namely % of strikes done) without asking what the circumstances are around it. As it happens, I'd much rather our pilots returned safely to base not having dropped randomly on Iraq, than engaging in wholesale slaughter without a credible target to attack.