I don't normally jump to the defence of referees - but it is so easy to criticise them for mistakes. The one point that I have never seen stated is that, at least IMHO, even the worst referees get the majority of the decisions correct. The referee rules on what he sees, or thinks he sees. He can never, repeat never, be 100% correct unless you are prepared to have a video review of every decision he takes (and even then errors are made!). You can imagine the complaints that would ensue if this was to happen.
In the case of the Strettle try, the referees "fault" was to accept the decision of the video match official. I further accept that the correct decision in the event of not allowing the try would have been to revert to the penalty he had given before time had expired. However, I feel part of the fault for this oversight could also be laid at the feet of England's captain who should have been chatting to him and reminding him instead of standing apart.
Remember, without a referee there can be no game. I also note the lack of complaints when Wasps were winning and probably getting the benefit of "doubtful" decisions.