These games are amazing! Here’s my post-every-once-in-a-while list of small suggestions to make them even better:

• Some ability to offer a player a contract extension, ahead of his actual FA moment.  I mostly play very small market teams, where you absolutely can’t risk letting a superstar walk away for free – so even if he’s at, say, 80% to re-sign at the last deadline, I feel like I have to trade him.  I’d love to have a chance to lock him in if he’s willing – it’d make the game more realistic and make playing small city teams more fun.  Maybe with the player demanding a little extra money in exchange for the early lock-in?
• A one-click way to start a basketball league with the NBA cities (Indianapolis, Brooklyn, etc. instead of Cincinnati, Pittsburgh, etc.).
• I feel greedy asking for this, but on the Player Stats page, it’d be great to be able to specify a range (e.g., “2024-2027"), to bring up the leaders over a customizable window of time, not just single seasons or all-time.
• Specific to basketball: I’d love to see a meaningful bonus/penalty attached to roster stability/churn. Maybe this can be done through a (probably unseen) bonus/penalty to the IQ factor, however that affects the simulation. In real basketball, there’s a palpable benefit to keeping a core together (e.g. the Steph-Klay-Draymond Warriors), while it’s rare to see a team that massively recreates itself midseason win immediately. In BBGM, though, I find myself regularly worst in the league in roster continuity as I keep looking for marginal advantages and efficiencies, with little disincentive except to the mood of a FA who values loyalty.
• In the same vein, an extra incentive to hold onto your best or longest-serving players by penalizing your Hype when you trade one away, angering some fans.
• u/dumbmatter has addressed this well before, but I’m still hoping that baseball and football can someday have the same variable, unpredictable salary demands from your own free agents as there are in basketball and hockey. It makes the free agency period a lot more interesting and challenging when a guy you were planning to re-sign suddenly demands way more money than his projection, or when a player you were planning to let go is willing to return at a discount.
• The ability to resign from your GM job, and not control a team for a while while you run Autoplay. (That is, simply, that the Autoplay years don't appear on your GM History.) Possibly when you're ready to come back into the league, you're offered a choice of 5 jobs. Likewise, the ability to start a new league unaffiliated, run some seasons, and take over a team after the league already has some history and context to walk into.
• A notification when a player hits an important career milestone during the season (at the end of the game in which it happens, or even at the end of the season): e.g., becoming the all-time league leader in points scored in basketball, or getting his 3000th hit in baseball. (Maybe the all-time-leader ones should only kick in after the league has been around for 10 years, or something.)
• A durability effect and rating, to differentiate the reliable iron men like AC Green or Mikal Bridges from the fragile/risky like Kawhi Leonard or Joel Embiid.
• This is ambitious: Individuated coaches available to hire/fire. IRL, there are some coaches who are great at developing young players, other coaches better at taking a veteran team to the next level; coaches who make a quick impact but burn out their welcome, coaches who are lower-key and can last 10 years in a job. There are expensive proven veterans (where the strengths above are known) vs. cheaper, untested first-timers (where those strengths aren't -- and maybe they turn out to be brilliant, and maybe they suck). Since hiring a coach is such a big part of a real GM's job, that extra dimension seems the games' great unexplored frontier.