However, when it comes to enthusiasm a playoff CT works as a "Normal" (i.e. you do not loose enthusiasm using CT in the playoffs) and a playoff normal works as a "TIE" (i.e. playoff normal builds enthusiasm).
For particularly important games, including league playoff games, relegation games, and the final two rounds of the national tournament, your players will be too excited to "take it easy". In these games, the only options available are Playoff Normal, in which your team receives the enthusiasm effects of a regular Take It Easy but the effort level of a regular Normal, and Playoff Crunch Time, in which your team receives the enthusiasm effects of a regular Normal but the effort level of a regular Crunch Time.
I don't see what the problem is. If someone expected TIE and CT to be completely removed from the playoffs -- this is not going to happen.
In terms of in-game performance, you're going to get exactly what you can expect from the tactic. If you wanted to make a strategic decision and chose one of the tactics without knowing exactly what it does, well, RTFM