If the passing plays out of that formation were more agressive, it is reasonable that he would have more ints, especially when attempting to be more agressive with the limited receiving targets he had last year.
This team isn't going to play like Pennington. He is going to have ints. The new additions and one year of experience should bring the amount of ints down.
Part of his problem last year was not going to the check down option and being a bit too aggressive. A perk of adding a Mike Wallace is that he stretches the defense and opens up room for the check down and slot guy to operate. This hopefully cuts down on the interceptions, increases Tannehill's completion percentage and improves the third down conversions.