Crawford and Booker are who they are and I don't think will not get any better, both are decent and deserving too be on a nba roster.
Vesley, Seraphin and Singleton pick 1 and try too develop him or just move the hell on totally, Seraphin chucks more than crawford he reminds me of Nick Young at the PF position. Theres no shot he will not take last night he took at least 2 shots a few steps from the 3 point line made one but still, His hook shots can look terrible at times, he doesn't pick up any fouls and on the defensive end he doesn't give his all. Reminds me of a bad big baby davis which out the skills and hustle. I don't think you keep Crawford and Seraphin. Just think last year we had Crawford, Nick Young and Seraphin all 3 haven't seen a shot they didn't like, then top that off with my boy Blatche and well what a terrible team. Crawford brings a few other things too the table he can facilitate well at times, I like him coming off the bench as instant offense.
Singleton and Vesley belongs in the D league they are either terrible or simply no where near ready. Singleton can maybe develope into a decent defensive player and a spot up 3 point shooter, Vesley I am not sure what his potential is, I am not a fan either one.