I skipped ahead a bit because things are starting to repeat themselves. Forgive me if this has been said before.
Project, your main argument about increasing the timer is to make it a bigger part of the game, correct? If that is the case, I can tell you without any further testing that if you drop it even by one or two minutes, it becomes a huge part of the game that people need to pay attention to. This has already been proven for years before with multiple smash games, including Project M. You are correct in this regard. Congratulations on a working theory. However, another thing that has been proven for years was the fact that the timer shouldn't be a larger part of the game.
The main issue with smash outside of items (which were used in brawl's balancing) not being used is how easy timeouts can be. Stalling is always in your favor (assuming you already have a lead), with the only thing preventing it is how long you have to do it for. I explained already how much easier it is to stall a 6-7 minute timer than it is to stall an 8 minute timer. 8 minutes is the closest you can get between "matches are lasting too long" and "timeouts are too easy". Do you know why Brawl uses 3 stocks instead of 4 stocks? It's because too many matches were going to time, and raising the timer made the matches too long.
The timer's job is not to be a big part of the game. It is only there to make tournament organizer's jobs physically possible scheduling wise, and to prevent people quitting games due to fatigue of an endless match. This is absolute fact for smash games. The timer has been proven to be more overpowered for every minute you put it closer to the average match time, and all dropping it down does is promote defensive play, more matches going to time, an unfair advantage to those who stall, an unfair disadvantage to players who want to play the game "correctly", and most importantly, a boring game to play.
So please stop asking for people to test this and give it a shot. It already has been over-tested, and we have an entire game's history (brawl) to back up the potential issues that a change regarding the timer causes. I really don't care if you play 6 minute timer and enjoy it with your friends. In tournament settings, people care quite a bit if a player that is clearly less skilled can win solely based on running away. I've tried it outside of a tournament setting and we were still almost at the point where we were going to put stalling rules in place.
Edit: Just a few things. It's not that characters like snake need the 8 minutes to play the way they should. It's that they need the 8 minutes to keep timing out out of reach. Making timing out a constant option for matches is a horrible idea. The game will honestly turn into "who can get the first stock" because after that they can just resort to the constant option of timing out.