I think any tech, new or old, should be easy to pull off in Brawl. And by easy, I mean even easier than they already are.
One of the things I admire most about the smash bros system is that any player can pretty much execute every move with any character once they have a passing familiarity with the game. There are no hidden combos, no odd timing required, and no elaborate series of button presses required to pull of a single move. All skill in smash bros comes from how moves are used, not from the fact that they can be used. Other fighting games may require you to master frame-perfect timing an god knows how many button combinations to unlock a characters true potential, but these games also create a huge gulf between the newcomers and the veterans. A newcomer, even if he's the best video game player in the world, has no chance against a veteran in games like these simply because he just doesn't know how to do half the stuff in the game. Smash bros is different. Right off the bat, each player knows how to do every move their character has in smash bros, and it's all a matter of strategy, not skill in pressing buttons.
And for me the advanced techs should become an extension of this ideal. It's not like the techs themselves are so overtly powerful that any beginner can become a master just by using them.
Lets face it: if you play the game a lot, and a noob beats you just because he used Sheik, or spammed smash attacks with the c-stick, or had the same ease at using advanced techs as you, then you suck at the game. Period.