For team selection, it's not really 3 games a day, but 2 every day in T11. Not sure what your time zone is, but here in Malaysia, daily update starts at 9am, now 10 for the winter or something. It would be good if we could do as you say, though, especially for the matches 15 minutes apart.

For tokens for player transfers, it's available as negotiations. A bigger possibility is that they will tinker around with negotiations instead of adding tokens into market transfers, but I'd like part of all the tokens spent by bidders in bidding for that player to go to the seller, a certain percentage rounded up, maybe.

Regarding player retirements, I don't think you should be able to talk a player out of retirement, but I would like the age to be extended to maybe 35 or 36. You've mentioned real life players continuing on far longer, but those are more of the exception to the rule, and many of those you've stated have dropped to lower leagues, you can take it as the same here. Your players simply cannot cope at your level, especially when you are winning promotion every season.

Regarding injuries, in real life, players can be out for the whole season, so it's not unreasonable. There's also no limit to the amount of injuries you get in a team in real life, players pick up various little knocks all the time, but recover in time for the next game.