PJ Washington does a lot of things well; he brings defensive versatility, above-average 3-point shooting, solid athleticism, screen setting, and good rebounding. He's a very good NBA player. But the Dallas Mavericks might be pushing the envelope a bit by asking him to be a primary (or even secondary) ball-handler this season, which seems like a realistic proposition.
According to Kevin Gray Jr. of DLLS Mavs, Jason Kidd alluded to Washington sharing ball-handling duties with rookie Cooper Flagg to start the season if both Washington and Flagg begin the year in the starting lineup. Now, it should be clarified that this might be more speculation than a reveal of strategy from Kidd, but still — it wouldn't surprise too many folks if a notoriously experimental coach starts the season with a pretty big experiment.