I, like most readers here, don't like Joe Lieberman (obviously). I, like most readers here, want him removed from his chairmanship. But I want him removed from his chairmanship not merely because I don't like him, but because of the real danger Joe Lieberman presents - Joe Lieberman with subpoena power to investigate the Obama administration.
Lieberman has been a partisan attack dog for the Republicans against Obama for many months now. Empowering that attack dog with the subpoena power that comes with a committee chairmanship (and especially on a committee whose role is broad executive investigations) is insane.
I'm guessing Harry Reid understands this concept, which is why he seems to be moving (too slowly, IMHO) toward stripping Lieberman of his chairmanship. It isn't personal - it's politics. Joe Lieberman cannot have subpoena power. It's that simple.