Bottom line is that if we'd of had a decent run in the Carling Cup, players like Brewster (injuries allowing) would have gotten game time this year.
Big problem was that a team that contained Ward, Robertson (as a new player), Gomez, Flanagan, Grujic, Solanke and Ox (with TAA, Woodburn, Ings, and Markovic) got beat by a 2nd string Leicester.
Klopp was taking League, FA Cup and Champions League serious (the sad reality is we could do with a trophy - one with big ears would be a nice start!) this season.
I think if we'd of been pushing harder for the League (or known that we'd go so far in CL) then I'd of not been surprised to see Klopp play more youth in the FA Cup.
At the end of the day, youth was given a chance and they screwed it up collectively.
Edit: you could also argue that if we hadn't drawn Everton in the first round of the FA cup, that also could have been an opportunity.