I started using this tactics with my underdog for four seasons.
It goes with a good results, but it is extremely unstable.
I saved a game before my match vs Juventus. I played 10 times (just re-loading the save). No changes in squad, no changes tactics, just 10 runs with identical team.
Results are coming from 0-6 to Juventus to 5-1 to my Avellino. No red cards in first minute or anything else that could possibly corrupt the game result.
Not sure if this is because game is broken, or unstability with this tactic.
I like it, I keep using it but it creates sometimes very strange results (like losing 0-4 to the team which is 3 divisions below with no real reason).