Well, in the games I run, my friend, all the dice are rolled out in the open. My groups are always playtesting, so this doesn't hold water. If you don't let the dice fall where they may, you can't find out how the characters actually work. It is a game, that is for the players enjoyment and the gm. This isn't about "professional sports." It's about "good sportsmanship." I never say "I didn't see that roll." Not everything is about dramatic tension. This is what I mean about "A shift in dynamics." In a dramatic tension game, the individual players are the focus.The other week, a PC died. But he accepted it graciously. Heroic Action Points are part of, in my opinion, a bad attitude.
What about the TEAM? This doesn't encourage teamwork, or working together, or anything of that sort. When I've been forced to use them in the past, I usually burn them for excessive power tricks to rescue innocents, rather than unloading on the bad guys with them. A good team will not allow things to get so dramatic that they are forced to burn their heroic action points to fix stuff. That's the point. A skilled group of characters working together should be able to defeat their enemies capably most of the time.
"It was over in an instant, the outcome never truly in doubt. They are the Justice League, and when united, no one can stand against them." I don't remember what issue it's from. But people forget about that "united" part all the time.