On offense the team is probably better, fitting very well with LeBron in particular (since Kyrie can shoot, he is a better fit than Wade, and Love has natural range).
I think Love and Kyrie could definitely both manage to be average if not better with the right system and really trying hard (which makes a difference with a different team and different stakes I think, has for guys like Pierce).
And you get defense from the other positions on the floor as role players.
That team would be very good. On offense I think they'd be really outstanding and on defense with the right players around them, very good as well.