Gabriponte22 I think what you describe in this new trait is already (or could be already) be covered by a mix of traits like ambition, professionalism, pressure and more and could be (or are already ?) covered by them... Why introduce another hidden traits, which i think are kind of "cheap game balancing tricks" to make a player evolve (or not evolve) with more or less arguable reasons.
So, a bit out of the scope of your suggestion, i m more in favor of a - no hidden attributes - approach at all, (most likely because i m not pragmatic enough myself (lol ?)), or just because this hidden attributes almost made me give up on FM (namely in FM21, 9 seasons club carreer) because of some radical "destroy a player with no reason" mechanism (and the end of a season of my club results too btw...)
To sump up : nothing (or so) hidden, everything that you could have an impact on by training or talking should be known, and should evolve (oh gosh...>> "important matchs" stuck forever 99% of the time ???) or... on the very opposite, why not a total "fog of war" mode/option game mode, and what you see is just the behavior of the player on the pitch, his results, his mood, how he perform and train , his physical condition and thats it. a more hardcore and/or life like mode so...
