catcherintherye
Player Valuation: £80m
It's swings and roundabouts I think. There are potentially benefits to players being given the matchday experience and it being a carrot for young players to be involved, but there's also the possibility of players getting ahead of themselves if they're introduced too soon or even just thinking nobody has done enough in training over the last week or so to deserve that little bonus. All in all I don't think it's necessarily a massive deal either way.
The other point is, which I must admit I didn't consider when I've made points about the bench before, is that if you're travelling with the first team, it often means you're not playing for your own game for the youth team/reserves. So players end up not playing.
There's a debate about whether training is better than matches at that level on a game by game basis, but in general having players miss weeks of games would not seem sensible to me.