I haven't read through all the comments here so please bear with me. I, like most people here, had some questions also about the late subs. But I pretty much figured that SH is de coach, and probably had his own reasons for taking the risk and subbing so late in that Mexico game. He must've had some inside info that most of us were not privy to, in order to make a decision like that.
I suppose sometimes you have to be willing to take some risks, especially when you're dealt certain hands. The fact is, regardless of the outcome, and regardless of how much we were out-shot by Mexico, we still put ourselves in an opportunity to win that game on Saturday.
We were not dominated by Mexico at all. Anyway, 1 year from now, I believe we'll be seeing a much more potent well-oiled machine of a team running on almost all cylinders....and the 'late-sub' decisions of the Coach will not be one he will need to employ down-the-road, because at that point, I believe he will have all his players focussed, goal-orientated (no pun intended), and well aware of their specific duties on the team during each match.
We won't be seeing much 88th min subs in the future, except to probably take time off the clock to protect a lead. At least that's my hope and humble opinion.