What? Please explain how the TS is "more customizable" than the Sport. I guess if your idea of "custom" is hanging a bunch of stuff off a rail, then ya, out of the box, the TS wins that category....but as far as changing handguards, stocks, sights, BCG, barrel, etc., they are both the same. They are both built on the AR platform and you can change anything you want.
As far as the sights, I'm going to disagree with you there too...better for what? Both the TS and the Sport have the Magpul MBUS rear sight right out of the box.
For the front sight, I like the fixed A2 style front sight base. "Better" will depend on the preference of the user. If you want to use a red dot sight without seeing the front sight, then the fold down sight is the answer. However, I believe the fixed front sight will prove to be more accurate over time, as it is pinned to the barrel and not being flipped up and down, subjecting it to movement.