So, here's my thoughts about this tactic after some testing with Liverpool:
1- Plays some great attacking football with nice combinations in the front and with nice periods of high possession;
2- One of my suggestions was a tactic that can break teams that play with ultra deep d-line. But I guess you've already think about that ahah;
3- This point has relation with the last point. When the team doesn't score the players become anxious and can't pass the ball effectively neither press correctly. Of course the results aren't good. When this happen in a series of matches I have a lot of draws and 1 defeat and the morale goes down. For this reason I decide to leave this tactic a bit and play some matches with Arrigo Sacchi one in order to turn things a bit. Leave this on match preparation though;
4- Maybe a version to seal out the games. For example, in Barça, Guardiola put Keita in the middle and move Iniesta to right or left flank. Maybe this is useful for the more tough games. Just an idea that I have. I don't know how to put this on FM
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5- This is obvious a good work (again). Just needs time and some micro manage to ensure that everyone is happy and don't get too nervous.
Cheers