I don't think your second question would ever have happened. How can it not impact other possible moves. We see this all the time - the new guy gets a ton of money so the other guys want similar money based on their contribution.
And your 3rd question will be a resounding yes IMHO. Duke is lucky that our brand name and quality of the coach makes up for lesser NIL probably but it is now pay for play. This off season is really disgusting IMHO. What's the point of watching 5 new guys every year, even pro teams do not have that kind of turn over. Unless NCAA does something, in a few years most every team will have new starting 5's every season. It is alreayd happening with the graphic from Elite 8. If I want to watch pro athletes, I would just watch Euroleague, which is the best league at this point. NBA is NBA, I personally find it boring with little defense, lots of ego's and way too many games that do not seem to matter at all. Euroleague has tons of fundamentals, most of the teams have a core that stays multiple years, and very strong local support for the team.
Interesting... back in the 70's through the 90's, I would watch a lot more NBA than college basketball. My relative asked me why... he claimed the college game was way more fun watching then the NBA. My response? I didn't care for the college game since players are "constantly" changing since no one could play for more than 4 years... whereas, the NBA teams had their main core players that I could follow year after year. Then, college became more fun for me since at least the core of the teams would stay together, mostly I think because transferring meant sitting out a year... while the NBA went to free agency where all players started looking out for themselves instead of the team and no more continuity.
Now all basketball is becoming hard to watch. With almost half of all college basketball players in the portal, who knows what any team will look like year to year.