He has a full NTC and has stated in the past he does not intend to waive it (he has some Phillies' records in sights that he wants to reach, like career hits, etc).
He may be willing to waive now, or when the Phils start to struggle.
Most of the fans love Rollins, despite the fact he's not that good and doesn't always hustle. From what I hear he works hard, just doesn't run out ground outs as hard as Sandberg would like.
Sandberg doesn't know whether to let it go, or stick to his guns and manage the way he sees fit. Rollins is meh, but Freddy Galvis couldn't hit his way out of a wet paper bag.