First off, I want to say that I'm typically for alternate rulesets, such as ISP. However, in this case, I don't really support a sweeping change towards 1.1 UNLESS it improves matchup balance in Brawl. The reason being, it ruins a lot of hard work put into all the work done by the community; Things such as Brawl guides, gameplay videos, and matchup knowledge are really shafted. More than just this, it's hard to test the effects, as you can't really use training mode since it won't have the alternate damage ratio turned on. All the frame data threads that include BKB/KBG/etc will have to be edited to include the new values, which aren't readily available in programs such as PSA/OSA2. Perhaps some stages will become banned/legalized because of this. Not to mention, a lot of players who are satisfied with the Brawl scene will be resistant to such a change. It's a lot of work for something that may or may not "fix" Brawl.
Now, I do think this is worth testing. If you want to see if Brawl is more fun/competitive with this change, take it to the smashfests you attend. It's better than a lot of the theorycrafting going on this thread how characters are nerfed/buffed.
I'm not against this if it turns out to be a more competitive way to play the game, I just wanna give a heads up to how much will have to be scrapped/changed.
Sunshade's idea to use this as a tool to enrich our counterpick system sounds very interesting, I want to add. That seems much easier to implement, and less game changing, while adding more depth. I wanna try that out!