I wasn't suggesting a 'still a kid' mentality - but was merely pointing out that at 18-21 in particular, whether coached professionally for 10 years (GENERALLY) or not, they are still learning their trade and are likely to 'often' make mistakes and wrong decisions. When pan lids at 21 have been to school for '10 years' they don't do everything their teachers have told them do they? As for international games, 2 or 3 games at that level will have given him good experience for sure - but that wont have significantly improved his game yet!!
As for inconsistent - i thought he did his job as a defender well enough yesterday - rarely getting beat, recovering well when required and clearing his lines mostly at the right times. But as most people have stated, because Eardley does have ability,he is willing to get forward and put crosses in, due to us not having a 'natural right midfielder/winger. However, if he continues to get forward, his crossing and general distribution will undoubtedly improve. If he was so consistent, then he wouldn't be playing in the 3rd division.