In the end, that's something of a philosophical discussion. The only way to have extended zone time in the offensive end is to take chances and be aggressive. That opens you up to transition chances against.
It's easy to say "be in the offensive zone but don't take chances," but that's not how it works. If you don't commit and you try and hang high, the cycle is broken up in no time (that's if you manage to recover the puck in the offensive end without throwing yourself in there aggressively in the first place).
I disagree. The cycle game is inherently low risk, where the cycle becomes risky is when teams who are desperate for offence take chances with low percentage plays off the cycle - including throwing the puck blindly to the slot, D activating into the play sacrificing their defensive responsibilities or pinching on pucks that aren't guaranteed retrievals and shooting pucks into blockers.
An effective cycle always has a guy high, regardless of situation.
That is how it works. A cycle of the three forwards, with one in the high slot is still not an easy breakup for defenders.
Theoretically, any pucks turned over on an offensive cycle would have had at least 4, if not all 5 Flames players above the puck, again making it low risk hockey. Any Anaheim transition off a turnover would be defended well. It takes smart plays, and some work ethic, but it sure as hell beats praying for every bounce to go your way.
Is it boring? Yes. Is it how many teams defend leads successfully? Yes.
End of the day, the Flames had over 30 games doing this without issue. They give up zone time, but the chances they give up are chances that 90% of the time aren't going to go in, let alone multiple of them. And this time they did, multiple times.
The Flames also had a prolonged stretch of finding success while counting on 3rd period comebacks to win games. While not totally related, it's about the process. We knew counting on those comebacks wouldn't be conducive to winning games, just like I don't feel sitting back to defend a lead is conducive to defending a lead consistently.
Regardless, I'd also argue the Flames haven't sat back that much with a lead in a long time.