You're entitled to think as highly of Adams as you'd like, but you need to recognize that your opinion is not widely held; no independent scouting service that I've seen has Adams ranked as highly as Briscoe. Briscoe is also particularly known for his physical and mental maturity, ideal for a freshman coming in.
I'm very high on Adams, but Gibbs was top-5 in the BE in scoring and assists, and was an elite shooter. He would not come here as a bench player. If he's coming to UConn, it's to start. Adams will still get plenty of burn. He'd be the third guard in the rotation, and given how much we go three guards, he'd probably play around 25mpg still.