Perk is so over rated. He was an average center who could defend. He is a below average commentator. One dimensional player.
I do think Perks defense was inflated by having KG on the same front court as him. I would take Queta over him in a heart beat. Imagine Queta next to KG...
I think Amari has plenty of athleticism
I had read somewhere that his vertical was around 26" and many scouting reports report average to lack of vertical pop. That is Grant Williams level of vertical leap, which is better than your average Jo,e but below the NBA average of 28" . He does have a 9'3" vertical reach at and 7?6" wing span is solid which help to compensate that lack of vertical pop. He is mobile for such a big guy, and has great passing instincts. This comes from largely playing soccer growing up.
I see him replacing Garza when Luke's contract is up.