With the summer league's popularity increasing over the past few years, would the NBA be wise to expand it to a full-fledged rookie/2nd year player league?

Allow the NBA to draft out of high school, then expand the NBA draft to 4 rounds. All players drafted are guaranteed a 2 year contract and are guaranteed to at least play a maximum of 2 seasons in the summer league. After each Summer League season, NBA teams can move these rookies/2nd year players up & down the ladder between the G-League & NBA as needed and/or based on performance. Summer League pay 30k with housing paid for by the team.

8 teams - 28 game season. May-August. 4 team playoffs. each round is 3 game series

Either find regional mid-sized cities (similar to the original D/G-League model) or set up rotating large market host sites each week throughout the Summer for a 2 or 3 game showcase. (NY,Orlando, Atlanta, Las Vegas, LA, Chicago, Dallas, DC, etc.)