Don't agree. The AI should be able to consider using hot prospects for easier home games, sub them in when ahead or change things up whenever they are down (like real life managers would do). This does not happen enough, so all the amazing prospects do not get enough game time which hamper their development, which has an effect on the overall future landscape of players, international team selection, etc.
Clubs buy up hot prospects and refuse to use them, which is game breaking for me personally, as I enjoy dynamic game worlds. Where is the new regen/wonderkid Messi, Mbappe or Haaland who already has 100 games under his belt at a top team/competition and is 180 CA by the age of 20? This will never happen now, because these players don't get their chance to play.
Clubs are allowed to use 5 subs in most competitions, but often only use 1 or 2, even when they are ahead with 5-0 at half time or down 2-0 in the 60th minute. Fatigued players are kept on the pitch even though decent alternatives are held on the bench.
I couldn't care less now if competing teams buy up hot prospects, as they will not use them anyway while I should be afraid of them developing a monster team with these additions. It would create a far more challenging and fun game in the long term if they would actually use them.