4. Grayson Allen
Grayson Allen? The guy who led the league in 3-point shooting during the regular season last time out, really? If you dig into this a little bit, there's actually reason for Allen to be concerned about his role moving forward. Yes he signed a new four-year deal prior to the playoffs and it is also true that his skills and position don't clash with the new recruits.
But Allen had a rough postseason - going from 46.1 percent from deep on 5.9 attempts per game - to a horrendous 20 percent on 2.5 attempts in that series sweep at the hands of the Minnesota Timberwolves. He's still likely to start for the Suns come opening night, but consider what a lineup featuring Dunn in his place could look like.
The Suns already have three elite scorers, and what they really need to go to the next level is a player who can close with that trio who is above average defensively. That's exactly what it is hoped Dunn will bring - and while he won't be thrown into the deep end to begin next season - he is capable of doing some things which Allen simply cannot.
Allen is probably an underrated defender - and his dirty reputation has been hard to shake as well - but he's not shutting down a Jayson Tatum in a playoff series. Neither is Dunn right now, but the fact he potentially could and fits well on paper with Devin Booker, Kevin Durant and Bradley Beal is reason enough for Allen to be looking over his shoulder right now.