I didn't watch Lucky Star to begin with, but it doesn't seem that bad. Miyuki and Tsukasa get on my nerves, but they are shitty characters anyway. Kari Wahlgren does a pretty good tsundere and Wendee Lee seems to a decent sort of otaku voice.
Not like they had much of a choice, though. Wendee Lee HAD to be Konata because the most important part of Lucky Star is the viral marketing for Haruhi Season 2.