I hate to say it, but so am I. It makes sense, though: you can usually afford to have one iso player on the court, but most teams can't handle having two of them.
The ideal second star next to a guy like Cousins would either be a top tier shooter (Klay, Peja etc) who doesn't dominate the ball and spaces the floor or a high level PG who can shoot from outside and be a playmaker (CP3, Curry, Stockton, even Lillard) and not a wing who loves to ISO and works best inside the arc.
He tends to. His shot comes and goes and he's limited in terms of athleticism and talent but Tolliver generally makes good decisions with the ball and makes the right rotation on defense.