A lot of that is in spite of him, not because of him. Our defence has been masked by the fact that Smalling is a beast, and DDG is the best goal keeper in the world. The introduction of youth players is because the youth is doing really well, that's not under his direction. Sure he's bought a few young players, but most of them have come through our academy or were already planned before he arrived(Shaw).
Better attacking? It was 2/3 games at most. He can't get his philosophy to stick, or be in any way consistent.
Twigg, at this stage if you think he's capable of leading this time to the next level, then I don't think you're being objective about it.
Not much to prove that he'll be able to do it. Smaller squad, lack of creative players, inability to coach a consistent game that works/beats the opposition.
His methods are outdated and flawed,his style is slow and ponderous and his management style is backwards.