^^^ Thats NOT how BPLT20 will be played. The above concept works for DPLT20 (if forms). You let the young and upcoming players play in DPL. Premier League is for showcasing STAR POWERS.
To get better you play with the best. True.
But the concept of IPL, BPL, BBL is NOT about gaining experience or letting young players play.
Its all about glamour, gambling and making tons of money. So you NEED STAR power. Regardless whether they are in/out of form, retired or old etc. You need name brand in PL. Thats why you see Murali, Ponting, Warne in BBL, Sachin in IPL but not in AUS/IND side.
Golf is good, no umpire needed!