Fredette was a high usage player in college, and in the NBA he never really got that role. He's probably someone who could carve out a backup role on a team that wants a player who is able to come off screens and shoot or penetrate a D, push tempo.
If I had to guess, I think Phil has him pegged in as someone that could be the team's backup PG, if they make a trade. Phil has always like a backup PG that can push the ball, monopolize it a bit more, and be a little adventurous vs the slower, reliable, steady (but not very talented) starting PG.
A 2nd unit of Porzingis/Williams/Thomas/Galloway/Fredette would be fun to watch in short spurts.