I think the writer basically made both Spock and the crew look like fools. It's not phaser or getting into orbit or any of that. The writer made Spock this clueless tunnel vision creature and then had the crew react like insobordinate jerks.
You can't defend too many of Spock's actions in this episode unless you resort to making excuses for the inconsistancies.
"They tried heavy stun--it didn't work!"
c'mon it's bad writing. great concept for an episode though.