[Solonor]

These are just things missing that we used to have in 6.5:

-An editable record book that kept team and rookie records.
-News stories that mentioned when a player broke a team record.
-News stories referring to in-game records (like most strikeouts in a game).
-Ability to set the leaderboard minimums to whatever you want.
-Ability to broadcast a game in progress to a web page.
-Option to have the sim stop and take you to a game in-progress where there's a chance of a no-hitter or some historic milestone
-Ability to define your preferred pinch hitters vsL and vsR
-Ability to get all your players into spring training without screwing around with Active/40-man Roster (even though the spring training was vastly different)
-On screen cues as to who the AI thinks you should promote/demote without having to run a report (i.e., the little red/green arrows)
-Ability to hold/send baserunner at 3B on sac flies and hits to the OF.
-Strategic one-pitch mode
-Being able to edit the text files (names, injuries, nations, cities) files at any time, and have them take effect, so you can correct errors or add stuff. (Those reload options in the current version still don't work.)
-Being able to set your own Promotion Days

And, of course, the OOTP5 ability to enter stats and have it come up with the ratings for the player.

But if you're talking stuff that exists vs. stuff that's missing, I'd still have to go back to rosters and situational awareness.

Rosters (not even going into historical details):
-There should be no requirement for Active or 40-man in Spring Training.
-There should be a Playoff Roster that respects the rules for playoff rosters (i.e., only players that were on the regular season roster on Sept 1, substitutions only allowed between playoff series for injuries, etc.)

Situational awareness:
-The AI should know whether a game is important enough to screw around with the pitching rotation to put the best pitcher on the mound even if it's not his turn or to have him available in the bullpen if it's a do-or-die scenario.
-The AI should know that the team has already clinched a playoff berth and to rearrange the pitching rotation so that the ace of the staff will start Game 1 of the playoffs if possible.
-The AI should know how to handle the All-Star Game and make efforts to get all the players into the game if possible.
-The news system should report on the pennant races and who won the American League Championship (there should be reports during the playoffs like the game actually knows there's playoffs going on, too).
-The news system should report when someone breaks a record (career or season), not just hitting certain milestones.