I think it's more that Villager and Mega Man (who is a zoning character I assume) don't have good kill moves. I'm playing Mario and Link and killing way earlier than I did in Brawl. It probably varies a lot by character.For new page don't kill me:
Three things are turning me off. Im still hyped as ever but:
Damage + knockback seem to be significantly reduced - the effects (plus hitstun) make it seem like attacks are doing an incredible amount of damage and are super powerful but in reality damage has been toned down compared to previous games.
New ledge mechanic - the new ledge mechanic has the potential to totally change the game, and not in a good way. Sakurai effectively removed passive K.O.s By that I mean K.O'ing an opponent when you actually don't have to do anything except stop their movement/recovery. Passive K.O.'s added variety and depth to the game. With their removal the game is not as interesting. I don't know why he changed it.
K.O. Bounding box - This in addition to the first point means that matches last longer and seem to be less interesting. I suspect that 2 stock matches will probably become standard unless the competitive community decides to raise the damage ratio for each match. Nobody wants to watch a match where the majority of play is a person being knocked far off stage only to recover and the cycle to continue again ... and again .... and again ... and again. It's boring. At that point it's not trading blows. It's trading one blow ... every 20 seconds. Someone needs to die for their mistakes and this game is way too forgiving. My brother baired someone at 200% and they didnt die.
I know everyone is hype right now and I'm not trying to deflate that but remember when Brawl came out and people were super hype about it? It took a long time for the denial to wear off. I suspect that the increased KO box/decreased damage and ledge mechanics will be the new tripping. It's just antithetical to competitive play and seems to echo Nintendo's mantra that everyone is a winner and deserves infinite tries to get there. All the new gameplay mechanics lend themselves to casual "retries". Are you not that good at smash? Well lets lower the damage so you can last longer. Are you not that good at Smash? Well let's increase the Ko box so you can last longer. Are you not that good at Smash? Well let's make it so that anyone can grab the ledge at anytime so that you can last longer!
The increased KO box size is probably to counteract the lack of momentum canceling people were using to stay alive longer in Brawl. I don't see how this or across the board reduced knockback would pander to casuals really.
Assuming you mean edge guarding by "passive KOs", I think you're exaggerating. Besides, it's not like Brawl had that much in terms of edge guarding in competitive play in the first place. Most of the popular characters could recover with no problem.