To me that would be #1 on the list "integrating into the offense"
See, I think the difference is building an offense around Kyler's strength that also bolsters his weaknesses.
In my attempt in building the poll, "integrating into the offense" really means answering the question "Can Kyler do whatever Petzing wants in his offense, or will we discover that we need a lesser talent to run the system?"
Petzing's left-foot-forward thing is a synedoche for forcing a player into the system to me.
What is the criteria to determine a top 8 QB for you?
It's not really a hard criteria; I wish it were more metric based. This will sound stupider than it is, but Top 8-ish to me is like Top 12 in DVOA (because there's some variance involved).
Another way to think of it is that a top 8 QB is someone who is going to be in the top 10 or 12 in most or all of the critical passing efficiency metrics: passer rating, DVOA, Total QBR, YPA, TD%, completion%, ADoT, INT%.
Another way to say this is that I don't need him to show that he's as good as Patrick Mahomes or Joe Burrow. I need to see that he's on the same level as Josh Allen or Lamar Jackson. Two years ago this would have been the Kirk Cousins Line.