I like Pressey, and I think in time his ability to defend and hustle for steals. Along with his unwavering court vision will allow him to be a great back up PG. I think if he improved his shot, since a lot of the defense is giving him open shots, would make him more deadly. If he can learn to improve his finishing, I can definitely see him as a great back up PG on any contender. Great skill set despite his height, and knows how to run an offense.
On the other hand Crawford has impressed me... He did go full out against the Pacers, and Grizzlies. He's a great player who despite his inefficiency, is actually the reverse, and doing well in his role as a starting PG until Rondo comes back.
I think if Crawford can remain consistent, but I doubt it. Hes a streaky shooter, who improved his sub-par defense, will eventually start having better or similar stats to what he had last year.
I also think he is a player who needs the minutes in order to thrive.
In the long run, I can see Pressey as the future back up PG. And Crawford as a good piece or trade asset for a superstar. I wouldn't keeping him, but I don't think DA will keep someone who may command a nice contract next year.