Works well with lesser teams too, although I did find i needed a plan b. The attached "away" version of the tactic plays on the counter more, if i had used this from the start of the season i would of won the league. I don't use it every away game, it depends on the opposition. If i think i am the stronger team i use the original version. But when I am protected a lead, playing a better team or playing a similar rated team away from home i use the away version. I think having the two versions keeps the AI guessing too.
I see no problem switching between the two tactics during games - it's all about game management