He used to come on strong later in games, and in fact was one of the best 4th quarter guys in the league with Washington and was decent (when not taking jumpers) last year with the Cavs. It wasn't always his shooting that made a difference, but his ability to pick off a pass or force a turnover at a crucial point in the game.
He was very good in the third quarter in a number of games this season, something we desperately needed given our 3rd quarter funk.
The thing is until February, Larry was just all over the map - and generally on the wrong side of it. He had very few good games.
But regardless of the situation, Larry is at best a streak shooter. If you put him on the court you use him for quantity not quality. To have a positive impact he has to get it done in the other areas and contribute with assists, rebounds, steals, defense, etc.