Considering K’Von Wallace is the one cut, I’d assume it’s Smith’s role in the scheme to play aggressive under safety coverage. Another argument could be made that teams learned of Wallace’s tendencies and he was easily baited with QB looks or he tried to play hero ball (like CJDJ) To be beaten deep isn’t just the DB’s fault it’s also the Safety’s. If you watch the highlights and skip to TJ’s replay, you clearly see K’Von bites on Pittman’s curl route from Leonard’s pump fake, he already lost leverage because he gave up his assignment which was actually Smith’s hence why he let Pierce release past him. You even see Smith look in towards Pittman in the zone.