See the message title. By this, I don't mean dumb stuff like: "Na Onka and Kelly should not have quit because they had only 11 days left."
I mean stuff like: "Coach and Debbie really shouldn't have stuck with JT and Stephen in Tocantins. Voting out Sierra was a big mistake, and they should have made JT and Stephen agree to voting out Taj, to prove their allegiance to their final four agreement, and then tried to convince Sierra and Erinn to vote with them."
1. ^ That one.
2. Burton's biggest (and only) mistake in Pearl Islands was a hypothetical situation where he came back to Drake, and joined an alliance with Rupert, Sandra and Christa, the three people who were tight, and running the Drake tribe so far, and the four of them would vote out Fairplay. Burton already had immunity, and he should have taken the opportunity to instead convince one of Rupert's allies to join Fairplay and him. I'm actually not sure if this would have happened if they hadn't merged.
I'll come up with more later, but I would like to start some intelligent discussion on Survivor.