Not too much new in this department, except for the fact that our
MU is very difficult and people are finally realising it (in reality it's probably pretty close to even but it's a pretty big deal considering Megaman isn't considered too wildly amazing normally).
If you're interested then more knowledgeable peeps than I can give a more accurate description of what's going on right now (it sucks being out of the meta for an extended period of time haha).
He's right though - average is relevant to the characters in the game. Average would be around the mid tier where any average should be haha, but what people obviously mean in this context by "bad is average" is that they're talking relevant to other smash games such as Brawl where the worst characters were truly dismal in comparison to the upper tiers, whereas this game it's much less so (in other words, Zelda in this game would have the viability equivalent of say, Sheik in Brawl).
DDD is a curious case, I do not believe he is bottom five, he reminds me a lot of Brawl Lucas in that he's kinda gimmicky and relies on the opponent not having certain tools to deal with him and/or not using them in a particular way, and as soon as they do he kinda gets shut down... much like how Lucas' FH Dair ---> dtilt lock combos could be avoided if you got used to SDI-ing everything or just waited out his Nair ---> jab combos. DDD is different though in that the way to overcome him isn't to directly make his gimmicky jank fail so much as it is to stop him from being able to use that gimmicky jank by way of pressure.
In other words, he can be truly fearsome and very strong in the right circumstances, but as you go higher and higher in level and in tiers he'll drop off a lot more. I would put him as a solid low tier, but nothing abysmal, not nearly. His ability to rack up damage off a few hits and convert that to a kill is far too powerful for him to be a bottom 5 character (most of the heavies in this game are decent for that reason - their hit rewards is good enough to keep them relevant for the most part unless they're really getting shut down).