I agree with everything Neko said, but I do feel we really need to keep the Smash crowd at heart. I agree with all your benefits, but would outsiders looking in see the benefits and try and learn it? Or would they shun it and what not. Either way, it sounds way too complicated. It would sure as hell be fun, but I'd imagine it would be line intensive.
Of course. That's all understandable. Honestly, if you're talking about new blood, the idea might be foreign, but the wonderful thing about techjumping is that its an option. Unlike Wavedashing, L-Canceling, Added Hitstun, etc. Techjumping would be an option that would not be required to be used. You would only benefit from using it, but lose nothing from not using it because you still had 3 other ways to tech so you could still manage a form of mindgame/variety/strategy/unpredictablity. Its not forced, its not a mandatory game mechanic. It would be balanced after some testing, and it would easily flow with the game while adding a new level to on stage recovery tactics.
In essence, a tech is a tech. If you get hit, you want to tech to help your own self out. It's not so foriegn as to put of players because the concept and the basis still are the same and unchange. Essentially, you're just teching in a new direction. That's what it is when you boil down to it. Its a tech in a new direction.
As for it sounding to complicated, as I just stated, at the root of techjumping, it's a tech in a new direction. Its another option that isnt required to win. If implimented, it would only be in your favor to take advantage, but if you win without it, good for you, eat a metaphorical cookie.
It sounds broken and looks complicated on paper, but the only way to know for sure is through testing.
Ultimately, because we'd be essentially extending something that already exists, rather than adding something completely new. And with a nice coat of balance of techjumping, it'd easily fall at home with plenty of users, both new and vets. So I doubt they'd shun it. It's like adding an extention to your home.
If you want to find out what the smashers ultimately think though, you could survey, but you'd have to choose your words properly because at first impression, it does sound broken, (though that would lead to overuse and predictability, and ultimately punishment.)
I know that i'd easily fall in favor of mainers/users of characters that have superior air game to their ground game ie Jiggypuff/Wario.
This is all going off assumptions based on reactions to Brawl+ though. Most People who played Brawl+ for a good setting and got accustomed to the changes essentially fell in love with B+ or simply enjoyed the game. Very few shunned it or think it went to far. Basing off this, I'd believe techjumping would be a welcome addition to anyone picking up Brawl+.
It'd also weaken the arguement of B+ buffing offense too much and nerfing defense. It cant really hurt the arguement of those who say B+ is balanced because techjumping is an option and not forced, and offense has ways to deal with it as well, that and it could be balanced to the point where it cant be used in that arugement. If someone argues it buffs defense too much, they should relook at B+ because defense has been taken down a considerable amount so that offense and defense are much closer together in terms of ratio balance. That and like the other forms of teching, can be dealt with via some form of tech chasing que Ganon Sid B, Snake Dthrow (LOL Throw.), and the good old shield and wait then shield grab.