@USARABAT
I like what you are trying to suggest in this thread.
The basic idea of allowing managers to chose what reward an AD gives is good.
We already have the choice....to watch for rest or treatments or moral boosters.
What we dont have is the option to watch for tokens.
This option was present on the browser version till 2-4 seasons back and was actually very bad.
In my association, there were folks who would watch 20-30 videos for 20-30 tokens every day!!!
And I got a GRAND TOTAL of 0!!! (I was able to farm rests via vids around this time)
So this creates a disparity between the folks competing on the same game due to geography.

Coming to your 3 suggestions:
How can TOP 11 developers help managers have a greater pleasure in the game ?

1- They are expected to increase the players "slow improvement indicator" from the age of 24 to 30 to create a deeper bond and a longer relationship between the manager and his players.
--> This is where your management comes into the picture mate. Here you have to make a decision what you want to do. If you have a player from age 18 to 24, you would have undoubtedly trained him to high white skills and grey skills will be very low. So, even though such players might be a full * lower than a young player and train worse than them, they might perform better. If you wish to persist with them, you have to MANAGE them better. EG: My striker is in his 12th season in my team...now 29 years old. It takes me 20 greens to raise him 1%!!!! But even though he is 5*, he performs like a 7* player. That is why I do not need to power train him to 7* every season.

2- Provide only ONE FREE 90% young academy player every season with a position according to the wish of the manager and not in random position.
--> Brilliant IDEA. Suggested many times in the forum, but doesnt look like Nordeus wants to revamp the youth academy

3- Shut down the auction during the first two weeks of each new season to encourage managers to train their players instead of buying and selling and resume the availability of transfers through auction only during the third and fourth week to strengthen the team and prepare for the next level. However in this case, the auction should show players between 90%-110% only no less than 90% and no more than 110%.
----> Honestly, this is not a good idea. I can understand the reverse, where you have TM open ONLY for first 2 weeks of season and close the TM later. Thats how the bug leagues work. Every team and manager should get the opportunity to build his team the way they want by buying players initially. If you are closing the TM, you are effectively handicapping the teams and deciding the winners in the initial days itself.