One thing that people overlook in the help forum is that what players you play at each position matters more than the tactical settings. Make smart personnel decisions and use the tactical settings to tweak around the edges.
Based on experience (if that counts as evidence):
Against Man to Man: Any tactic other than Base Offence, Push the Ball and Patient
Really? This has not been more experience at all. Depending on the strengths and weaknesses of each team any of the non-focused offenses can be a completely and totally viable option on offense. Since there's no penalty for using them I would probably default to them when facing a balanced opponent if my own offense was also balanced and hope to find an advantage elsewhere.
Well if both teams are exactly the same, and one team is playing man to man, then if you play any of the neutral offences then you will match up equally. Wouldn't you rather play something like run and gun or look inside where at least you get a bonus in 1 particular area?
For example:
Respectable (High) Outside Shooting and Respectable (High) Inside Shooting vs Respectable (High) Outside Defence and Respectable (High) Inside Defence
Or
Proficient (Low) Outside Shooting and Average (Medium) Inside Scoring vs Respectable (High) Outside Defence and Respectable (High) Inside Defence
Personally, I think the second one would win most games, where as the first example could go either way.
The way I look at it is, if both teams are equal and they play man to man, I will gain no advantage or disadvantage by playing a neutral tactic.