I don't like the reasoning.
I don't like the way we are using him and given our history of stagnating promising youngsters like Suso (granted that was pre Klopp), I am fearful of keeping players in the U23 and not letting them get action at a higher level.
This is a perfect game for Ejaria. We could lose tonight with or without him. But the League Cup as nice as it would be to win, is clearly the 4th choice priority for us. If we don't give him chances in games like this he should be on loan, like Kent, Ojo etc.
Klopp's been quite clear that he wants the U23s to function as a proper team in its own right, and that he sees that as the best way for those lads to get games and still be able to train with the first team squad. It's not an ideal situation, but there is no perfect answer to this.
Selection for this game is going to be a balancing act between putting out a strong enough side to win (can't get my head around Liverpool fans who want Liverpool FC to lose games of football. How does that even work? Will you be cheering for Leicester tonight?) and giving game time to players who we don't want to risk in the league for various reasons (which itself is a fucking good reason for taking part in the thing.) The whole question of "competing on too many fronts" tends to sort itself out in the obvious way, and it's clear that this is our lowest priority. If we were putting out a full strength first team, lads who have played every minute so far then yes, that's a problem, but come on, it's September, if we're running out of legs at this point then something is badly fucked. There is no obvious connection between a run in the cups and a strong league finish, sometimes it correlates, sometimes it doesn't, but dropping out of the League Cup in the 3rd round doesn't guarantee anything - except not winning at least one available trophy.
The goalie situation is an odd one. Klopp wants Mignolet and Karius competing for the place, fine, but then having Ward come in as well? I don't think that's sustainable in the long term. As for the midfield, Grujic is and should be closer to the first team than Ejaria at the moment, so of the two it makes more sense to play him and playing both might leave us more exposed than we need to be.