I think basically what he is trying to say is that he believes that Melee is a much better spectator sport than SSB4 will be. The hype and speed of Melee is what has kept it alive and growing for the past 15 years. Melee had it's biggest year ever in 2014 and is slated for an even bigger year in 2015 (there was already a day where Melee had 6 100 player tournaments in one day, whereas about 5 years ago there were maybe 6 100 player tournaments per year). This is because Melee is, in the eyes of most people (not necessarily my opinion), way more fun to watch. I followed the tournament pretty closely as I love competitive smash and about 60000 people were watching melee and 20000 people were watching SSB4 throughout the day. For the grand finals, SSB4 had about 70000-80000 viewers and Melee had 110000-120000 viewers. The defensive mechanics in SSB4 (strong shield, ledge play, fewer movement options, lower hitstun, etc) lead it to being much slower paced. The top 8 of SSB4 took approximately as long as the top 8 for Melee despite Melee having double the amount of stocks per game and 11 more games being played in Melee top 8. If you enjoy the mechanics in SSB4, great that's your choice, but theres no denying that the mechanics lead to much slower games and in most people's opinions (again not necessarily mine or yours, but just in general) this makes the game more boring to watch.
Of course, this could always change as the metagame for SSB4 develops, and as players get better the game will inevitably change. One of the reasons Brawl was only successful for about 5 years was because as players got better the game actually got slower because they dropped the Melee mentality of fast, aggressive gameplay. This lead to matches becoming slower and less appealing to spectators as time went on, whereas Melee has gotten faster and faster. Although the comments earlier that Brawl was a complete failure competitively are horribly misled. Brawl absolutely dominated the competitive scene in 2007 and 2008 and it appeared at the time that Melee was going to die off. Melee recently became popular due in part to the release of the smash bros documentary (definitely would recommend watching it, although it doesn't do Brawl justice).
As to earlier comments about wavedashing and Melee mechanics, from personal experiences and what top players have said, dash-dancing is actually a much more important movement option that has been taken out in SSB4. Someone earlier incorrectly said that dash-dancing is in SSB4 when it isn't, SSB4 has foxtrotting which is also in Melee, but not nearly as useful as dash-dancing so no one uses it.
Also in response to OP, I can see where the Melee crowd was coming from as Melee was the main event and was delayed 3 or 4 hours, but it was still terribly disrespectful and I hate that this negative trash is what people will see first when looking at the smash community
