Interesting points an enjoyable read. Never a call IMO when he bet the flop so big that would be my cue to fold. You're going to make your OESD less than 1 time out of 3 and that's only if you've committed to going all in so you are guarnateed to see the river. So the only reason you would call or reraise here is if the pot (or implied pot) was giving you greater than 3:1 return for your money. You're not getting nowhere near the pot odds assuming he calls to make that all in commitment, and I think in this situation you HAVE to assume he's going to at least call your raise.

I see where you're coming from with the semi-bluff raise, but I don't think you can use that tactic effectively in free roll tournaments. I definately agree with cowboyardee that bluffing is a really bad idea in early stages of freerolls. Most of the players you'll meet in these from my experience, and especially in the early stages, will open with such a wide range that it's fairly safe to assume anyone that's betting has at least made a pair. By the time he's made his first pot sized bet unless you completely push over him you can be fairly sure he'll just call with any rubbish pair. Also about 20% of the players you meet in the early stages are of the mindset that they will just gamble with pretty much anything for the first few hands to build a stack and then play properly later. By playing tight early on you let these 'donkers' knock themselves out before they've had a chance to force you into a coin toss.

Also on the subject of chip preservation, I agree with Thunder that it's important that you're doubling your chips every so often. I've got a slightly different take on chip preservation in the early stages though. Wait until you have the nuts or until you have a very good read in a HU - I definately wouldn't be lead betting big on the strength of drawing the nuts, and I'd only call a big bet if I had VERY good pot odds. As soupie advocated in his mtt article Tight is right for the first hour. You will surpass half of the field usually just by playing tighter than tight for the first hour. Once the blinds start raising then you can start opening up a little, but not in the early stages IMO. Unless it's the VERY early stages like you were in 10/20 blinds then perhaps call 2/3 bb raises, or limp - with suited connectors for value. Personally I wouldn't limp with any offsuit connectors.

Thats my thoughts for what they are worth. Good Luck