According to NBADraft.net, Evans will almost certainly start his career in a reserve role but he can become a starter after a few years in the right system. His floor is relatively high and he has what it takes to stick around in the league even if as a reserve. Even if he struggles on defense, I think his offense will make up for his shortcomings and provide value to the team.
Jeremy Lin will be a fine mentor if Evans is drafted by the Nets and the point guard depth will be upgraded over last season. Evans should be more than capable of running the second unit effectively while providing an additional scoring punch that is needed from the bench and at times, he could even play together in the backcourt with Lin to change things up with the lineup. Both players are known for their abilities with the pick and roll and Kenny Atkinson should incorporate more pick and rolls in the motion offense.