I'm not a developer or administrator but I guess I can answer to some of the questions.

Training
1) Next season, we must start our training levels from the beginning or we just continue ?
- No you won't need.

GamePlay

2) Attack or defense bonus always working in a game ? What's the difference from setting Hard Attack or hard Deffense ?
- Yes because that's how the game is designed but how much this difference will count I guess not even the developers can't give an directly answer who will please everyone. In big lines is same with hard attacking and hard defensing, is motivating more the players.
3) Assistant manager recommends two training before the game (for better preparation). Why is that ? If we don't train, is there any penalty in the performance ? Where ?
- There's no penalization from what I know and what they told me and I assume the 2 training sessions are just symbolic but here I might be wrong. Indeed they must come with a clearly answer regarding that.
4) Why the assistant some times gives so silly advice ? For example, "go for attack" while we 're already in attack or "be careful because opponent is very dangerous from free-kicks" while at that time he didn't even had a single earning foul.
- I assume they can't give an answer to please you guys but isn't hard to guess. Everything is just a bounce of options from where he can choose based on the statistics, orders, etc but I don't think is possible to create a perfect AI who can guide your team.
5) Why with some comments we already know the result ? For example, when we read about bicycle kick, we know it's a fail. When we read about a double corner, it's also a fail. In the old times, a double corner was always (or 99%) a goal.
- Regarding this I spoke with them and yea on the corners they decreased the values because before from what I understood was to many goals from corner. Regarding the commentaries there can be an easy fix, they can just create more commentaries and more combinations but even like that after a time people will pretty much learn them too.
8) In the live game, we can see some times the special ability icon. So, we can understand that sa worked at that time. During the live game, is sa working other times too (but we don't see the icon) or only when we see it ?
- From what they told me is only when you see it but not all the abilities are represented by their specific icon during the live game, ex: play maker.

Others

1) Why in the old version, we could see all the team in the screen, while in the new one we must scroll up or down all the time ?
Is there gonna be some update about that too ?
- Won't be from what I know because they try to keep both versions same and here I talk about mobile and desktop. Why we can't see it? Is just from the new design of the game.

Cheers guys!