Promising early signs.
From the new recruilters, Diallo is a Sancho-calibre of young talents, Pellistri is also promising from what the reports say. Hugill has been putting goals immediately at 18s and 23s level despite being just 16. Carrares looks like a top talent at LB (only saw him play 1 game mind). Hansen has huge reputation in Norway before he joins. Willy is among the cream of next generation of French CBs coming through (and we know that they produce quality defenders on regular basis). Pye also did well so far on the 18s and 23s games he played. Obviously McNeill scored a lot of goals on lower age group.
We also see players already at the club taking the next step with the likes Mejbri, Elanga, Fish making impacts at U23s level and possibly competing for a spot in couple of years time. Garner doing well on loan so far. Kovar playing regularly at League One at 19, following Henderson's footstep. Hopefully Laird will stay fit and obviously Mengi did so well last season that he's part of the first team bubble now. For the younger players Shoretire has started to step up to U23s level at 16 and not to mention the likes of Hardley, Emeran, Forson etc plus players from the age groups below them which are too soon to be mentioned.
Simple statistics, the more talented youngsters at good enough calibre you have, the more likely you'll produce the players of the calibre that will challenge for first team spot (with proper coaching/pathway), also it's easier for you to get the mediocre senior players out of the squad without worrying about "the depth".
Many fans here don't like Williams but fact is without him we would not be able to ship Young out last January. Williams were killing on the few U23s games he played before the promotion (top assister) couple of the injuries that gave enough confidence for us to play him on the deep end, and get Young out.
Now, it's not a cliche to say you need to be patient with young players. Many of them will not work out, especially at the level we strive to become. Some will not hit the ground immediately. And that's perfectly normal, especially for those stepping up immediately from the 23s so no senior footballer experience. Greenwood is the outlier not the norm. Being knee-jerk in your judgements help nobody.