The thing is, I don't feel like people have really dug into what really is possible in brawl+
Them playing their respect mains from vbrawl would bring them to use habits that they are all to familiar to doing, especially considering the game looks the same.
The fact is that the game is drastically different, but they were still playing it as it wasn't. There are a ton of different viable options and advantage of them.
The fact that they beat other other Brawl+ players could be that they are both just generally good minded players, I mean they are both high placing players after all.
Both Lucario and Snake have new tools that they could have both taken advantage of but didn't. I really think a big problem is people are still playing too similarly to vbrawl. We are just scratching the surface really but once people get out of that vbrawl mentality, then I think you will notice a drastic difference.
Of course this is just a big IMO statement.