You...you want him to terminate his high paying contract to fight for peanuts? You know fighters are drastically underpaid as a whole and this is how they make their living right?
The top fighters in B promotions can hang with good UFC fighters, hence why they get paid a lot of money. What you're implying economically makes no sense.
Also, that isn't true that fighters leave early from the B leagues to the major leagues. How old do you think Eddie Alvarez was when he left Bellator and went to the UFC? He was around Lima's age....Lima is only 32 years old. Lima is pound for pound a better fighter than Alvarez in my opinion, quite frankly I am shocked Eddie even became UFC champion.
All the top guys in Strikeforce would have stayed in Strikeforce because they were paid better, and that wouldn't make them lesser fighters. People said the same thing with the WEC guys, and heck they even had a better point cause WEC was literally owned by the same company as the UFC - yet the top fighters in the WEC all did incredibly well in the UFC. Ben Henderson and Anthony Pettis were literally in the lower promotion and became champions in the UFC almost right away - they didn't even need significant time to develop, they were essentially top ten caliber just not in the UFC.
Douglas Lima is pretty clearly a top ten WW if not a top 5 guy. I don't know how anyone can regularly watch MMA and not see that. The guy trains at American Top Team for god sakes, I highly doubt his UFC peers look at him as leser.
I've been in gyms that have UFC and Bellator guys, including a UFC champion. It isn't true at all that the top Bellator guys can't hang, they literally go there because Bellator pays a ton of money. The UFC isn't the NBA or MLB, it doesn't pay high enough to get all of the top end talent. Furthermore because of the way gyms work you can literally train to become a UFC caliber fighter without having to go into the UFC - you can't get NBA caliber training unless you're in the NBA, for the most part. Top tier gyms in MMA are accessible to anyone.