Well, I rather liked Ness, even though he was never somebody I used extensively in smash... it is a little bit sad to see his chances of being in Brawl be crushed to molecular amounts, especially since he's been with us for the past two games... however, this was pretty much fated to happen from the very beginning anyway, considering Sakurai confessed that Lucas was going to be in melee over Ness.
I'm thankfully the kind of person who accepts this new change and is willing to move on. Lucas feels nice and familiar to any Ness fan with his similar weapon preferences and appearance, but he's also his own character entirely, with a more in-depth story to him and even a few speaking roles along the way. I'm not saying Ness is a block of wood though, it's just he has more in common with old, silent RPG heroes while Lucas is more like the newer guys... especially with his tearjerking story, most RPGs like emotional stuff now.
I will miss poor Ness dearly, but I think Lucas is a fine evolution of him and I'll be more than happy to main this nice new kid. Besides, I can always play melee again and preserve his memory forever. It's funny how most people have forgotten about that, really!
If Ness DOES come back though, I would be a very happy person indeed.... I just have NO idea how they would pull that off though, since Lucas just seems like improvements all around, except for his completely different physical moveset.
(Which seems better in a few little cases anyway)