I would've loved to just alternate the same way we did in the regular season going into the playoffs and see if someone takes the reins. The Islanders (and perhaps this is disrespectful) seemed like a safe enough team to do that against. Then, if someone starts to fade off, or if someone starts to go bonkers, you have a bit more info and/or rest going into Round 2.
That said, I didn't really hate the notion of going into the playoffs with Freddie as the starter, either. And he played great for the first half of Round 1 and it seemed like the right move at the time.
What I don't like is the insistence on going back to the well after it proved not to work. Freddie was off, plain and simple. I'm not putting the whole series on him, but he was off, and anyone who's saying he wasn't is being unserious. It's not like giving Pyotr a chance would've been an overt shot across the bow at Freddie or anything either, you've been alternating for the last 2-3 months and it was time to alternate again.
Pyotr deserved a chance to show more than he did this playoff run, and unfortunately I do put Game 6 more on Freddie than anyone else. Goals 1 and 2 were eminently savable goals that cracked the door open for the Rangers and they did the rest.