From my online tourney play experiences, which consist mainly of
freerolls (don't mistake me here, I know how much all of you detest freerolls and the frw who play them), online tourneys have changed a lot in the last year. Especially since the US ban. The US ban mainly caused a tightening up of the game, with more of the remaining players working on improving their game.
This year alone I would say that the improvement in play is around 50% better poker than last year. Or maybe that is just that I am playing 50% better.
Incidentely, I find no real difference between freerolls after the initial donk outs, and up to $5.00 tourneys. I have no real experience in higher limits except yesterdays wsoof ME. Actually it wasn't a whole lot different.
TAG early, loosening up before the others loosen up, and then tightening up before the others tighten up. Short handed final table play, and HU requiring smart aggression. Along with reasonably good reads.
If that is what your books revealed long ago, then you're right, tourney play hasn't changed much.
I would move to the top of any tourney strategy, as the primary consideration,
survival. When I use that as my guiding principle, I always advance further than when I choose looseness or tightness or maniacal insanity as the plan.