Wow... I wish more of the season would've been more like this episode. Scotty, Gorn, adventure, suspense, worry, fear, screaming, excitement, happiness, relief, battle. The only bad part was the last text on the screen, To Be Continued... Yeah, like when?
I can see why Pike froze... It wasn't so much the battle, it was more the orders from Starfleet to withdraw and there being people (including Enterprise crew) being captured by the Gorn. The conflict he faced was to obey orders and withdraw vs. leaving people behind (plus the battle and protecting his own crew against huge odds). It's a bad situation to be in.
This episode I will likely watch again, perhaps tomorrow afternoon. I wish it had been a tad longer is my only gripe (besides it being the last episode of S2)...