You have to keep in mind that quickness without reaction is basically meaningless. It’s likely why Knecht has the fastest lane agility time but the tape indicates he’s not good laterally. Being able to react quickly to the offensive player is arguably more important than the quickness time of someone who knows exactly the directions he will be moving.
From the tape, it sounds like
@hrdboild is not overly worried about his ability to stay in front of defenders on the perimeter but given his size, length, jumping ability, timing, instincts, reaction time, etc., staying in front is not the end all be all. Just look at someone like Wemby. He’s not quick enough to stay in front of 1s and 2s but his length allows him to be a deterrent on their hip or even behind them.
From what I have seen (and it’s been limited), I think Chomche will be just fine defending the perimeter and switching onto smaller players.