Why is Beal being ranked so far below Lillard?
I agree that Lillard is better but I do not believe it is much of a difference. Beal is being under-rated. He is a fantastic scorer at 31ppg at 59% TS%. He provides high caliber secondary playmaking from your SG position allowing you to get an extra ball-handler and passer at PG on the floor alongside him improving team passing. Not much of a defender but then again neither is Lillard.
Why such a large difference in the evaluation gap between the two?
For me, Lillard has consistently proven the ability to be the #1 guy on a playoff team capable of winning playoff series. He is a legit PG and a borderline top 10 player. Beal is a secondary player who has never shown the ability to really carry a team. he isn't as efficient, he isn't as good a passer, and he is worse defensively than Lillard. He also isn't a better all around player than Brown, while Lillard pretty clearly is.
I'd absolutely trade Brown for Towns or Lillard, and would consider Simmons (given his defensive versatility and how well I think he'd actually fit at the 4 next to Tatum). Wouldn't even consider trading him for Beal.