I don't think having a team of regens is a good enough test of the tactic. Your team could be full of superstars, in that case a bog standard 4-4-2 on Very Fluid will be just as effective!
One of the main ways I concede being a weak team like Crystal Palace, is the Offside Trap. I don't think my defenders have the intelligence to pull it off.
It has very little effect on the performance of your team. Aspects like Morale, Weather, Fitness, Luck, Form, etc. have a far greater effect! So keep them in check and the tactic should perform to it's potential.
but i enjoy 'ROFLing' :S
Training has minimal/no impact on the tactic! Whatever tactic you use, I would suggest using Def Positioning against tough teams, Attack Positioning for weak teams. If you find that the opposition are particularly good or bad at Set Pieces then perhaps use Attack/Defending Set Pieces.
It all up...
Really like the whole idea of this tactic! I think you've done really well in getting this high tempo, high pressing game. :)
I've been having a little 'test' save with this, playing as Crystal Palace. So far I've played 6 games. Winning 4 and Losing 2. These results are great with Crystal...