Just for a frame of reference, 5 of Chevy's top 7 homegrown RFA negotiations went into training camp without a deal done (KC, Laine, Trouba, JoMo, and now Perfetti). The only two marquee guys that signed prior to camp where Mark and Ehlers. Ehlers though was signed a year early (only player they have done this with).
Trouba wanted out so he's in his own category.
JoMo signed Sept 16 which was a fee days into that camp.
KC and Laine signed on Sept 28 and 29.
So there really is nothing to see here, this is just normal operating procedure for the org with these types of deals.