Not meaning to justify the cartoon series but...
Superman has less powers and seem to act like a wimp most of the time.
I think they toned down Superman's powers a bit so he wouldn't stand-out (or save the world) most of the time. He could still do superhuman feats but most of his abilities are played down probably to give the other leaguers a chance to shine.
Wonder woman changed her name and although she retains her powers, she oftens acts like a prom queen.
Ummm sorry but what name did she change?
In any case, she IS (technically) a princess who grew up in an isolated island without any contact with men so her prissy attitude's actually justified IMO.
The Flash has become the group clown, all zing and no sting. Green Lantern lost that original Hal Jordan suave appeal, he is more smug now probably because he became black.
While I would've wanted to see Hal Jordan in the series rather than John Stewart, if they made The Flash less comic-like, the two characters would be redundant (not of power but in terms of characterization probably).
And what is the deal with the Martian? Do this series need an alien guy to prop its ratings?
The inclusion of the Martian Manhunter IMO is a classic move as he is actually one of the original 7 members of the league.
As far as I can recall, he was never featured in the old cartoon series so it's a treat for me to see him in full animated glory
Batman is the only one who has managed to retain his character. The loner, mysterious bat can still kick butt in this series.
Yep - this one I wholeheartedly agree! I think the reason why they retained his attitude is because fans have grown to embrace this portrayal of the character (because of the 90s Batman animated series) rather than the campy one.
The old Superfriends cartoon is great but I think the new series can hold up it's own against it. Perhaps the only aspect that the new series has over the old one is the opening credits