There's blame to go in both directions with Tannehill to Mike Wallace. One question I keep asking on this topic is why doesn't Brian Hartline have this issue with Tannehill passes? Does Tannehill usually hit Hartline in stride? Seems that way.
Something nice to consider is that year two with any receiver is usually a big step up. I think it has a lot to do with getting comfortable whether it's with the QB, the coaches, or the culture of the NFL. Wallace has been around, so my thought about year two is obviously riding on Tannehill and Wallace having that extra sense about what the other is up to out there on the field. I saw Tannehill attempt some lob passes to Wallace, which is a nice play under tight cover. That's the kind of play I see from the better QBs in the league, and their receivers seem to know what's up before the ball is in the air. I hope to see that from these two this year.