I think the quality of the targets is the most impressive part.
It might be late in the window and people will moan about it, but any of Zaha, Zouma, Doucoure etc wouldn't need any time to adjust to the league.
Zaha is without a doubt a big talent and his numbers get better every season, Zouma was a key part in a defence where we had a great run of clean sheets against quality sides, and I'm actually surprised Doucoure wasn't picked up by PSG as he was heavily linked with them last season.
Sidibe is a very experienced player and getting into the France squad alone shows his quality. We can also ease him in just like with Digne because Coleman is still very much a good reliable option.