This isn’t a front office problem, it’s a league office problem. Any solution that requires competitors to not do everything under the current ruleset to win is simply going to be ineffectual.
The collective issue with NBA interest decline is the push and pull of front offices that are incentivized to do what’s best for winning v. what’s good for business. This has become more problematic in a ubiquitous content environment where it’s harder to win attention of viewers