Robs will try and create issues by Landry's late arrival to OTAs but it isn't any big deal. Landry is one of the most well conditioned players in the league so it's not that big of a deal. Sure, we would have all liked to see him there for unity but OTAs are largely for the younger, more inexperienced players or backups to show what they can do. Training camp is where it really begins. That is when you strap on the pads and get to work.
Landry is kind of immature that way in that I think he will blow off some things he doesn't see as absolutely mandatory. He had an autograph signing about a year ago that he blew off and he gave the same excuse that he did for missing the first part of OTAs -- that he had some personal issues to take care of but he apologized. It's not a big deal so don't worry Robs.