He did - his actual goalkeeping is very average, but that’s overlooked because of his left foot.
I disagree.
Weaknesses:
His aggressiveness - coming out of the box to challenge for balls - is slightly overused - on occasions this season, he did not arrive in time when charging out of goal or had to make desperate, risky challenges after doing so. A bit more discipline in this regard would serve him well.
Secondly, Ederson's positioning is at times clearly off - getting angles wrong. Charging out of goal makes positioning a bit more difficult though - so this is understandable given his aggressive nature.
Strengths:
Ederson is easily in the top 2 best keepers in football at distribution (Ter Stegan is his only competition).
Ederson has good reflexes and when in position stops almost all goals he should obviously stop and not infrequently makes excellent stops that most keepers would not.
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I think that aggressiveness and positioning are factors that can be refined. A bit more training/experience will - IMO - see Ederson dramatically improve in these areas.
But reflexes, and talent on the ball... these cannot be dramatically improved - either you're born with good reflexes and are good on the ball after a few years - or you're not - no amount of training will change slow reflexes to fast or poor ball skills into world class.
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TL/DR - Ederson has weaknesses in his game but those weaknesses will likely attenuate as his experience in goal improves. Ederson is talented enough that he might conceivably be the world's best keeper in coming years - failing that, he's already the best keeper bar perhaps Neuer (better keeping) or Ter Stegan (similar distribution but currently playing very well in goal) for our system.