Hmm, lots of init.d scripts (but no ThunderBolt! ?).
My take is to remove all the init.d scripts (back it up somewhere) and then install ThunderBolt!. See if you still get the random reboots or not

Read it slowly. Anything you don't understand, just post here

It's not that noticeable, but I guess odexed is still the way to go since its the most optimized.
Yes. Journaling is still on, but with barriers off. Journaling is the main protection, while barrier is the addon.
Yeah, sort of related. Hence why I gave a warning that libsqlite can cause corruption. It's rare, but its a risk that you need to know of.
Umm, OMAP4 device needed. SGSII is an Exynos device?