Respectfully, I don’t think you understand the concept of the play call.
The reason you run a back to the flat, one TE runs a deep out cut and up, while the other TR runs a deep in is to make the safety AND the corner to make a decision. Reads go from deep to shallow on most drop back passing plays.
The safety sits on Fidone so as Rhule correctly stated, the other TE was wide open for a touchdown. Do you know why the safety was comfortable sitting shallow?? Because he read no flat route allowing the CB to sink (but ahhh, we did have a delayed flat route and you will notice the corner see it late and break up towards the RB and pass the deeper route to the safety. By that time the safety sat too long and the TE was open deep. BTW…our head coach expected the TE to get open over the top.
I 100% disagree that it wasn’t a great play design and the coaching staff did their homework on that one.
here is his remarks at the 9:35 mark.
I understand the concept.
And probably the deep route was technically the first read. But for that read to be open - especially with a Tight End running it - you have to be counting on the safety - who is in zone coverage - just completely dropping the deep route. There is no defense that is designed for that to happen. There would no way that our entire game plan for the first play hinged on them doing something completely stupid.
And I don't think it's obvious as you say it is that the safety was coming off the deep route. He was literally on 87's hip as HH was throwing the ball. You might expect a receiver to be able to run away from a safety - "if he's even he's leavin'" - but this isn't a a receiver. Safeties can run with tight ends.
It seems significantly more likely that the real plan was for 87 to take the safety deep with him and let Fidone win the matchup on the underneath coverage - which he did. But the two routes were too close for too long and the safety could play both guys until he got a read that the throw was going short.