Obviously, your analysis is completely wrong. You say Wallace is a "one-trick pony", but this is demonstrably false. I assume you're saying his "one trick" is getting deep? Well, I hate to break it to you, but he had 73 catches this season, and because Tannehill could not hit him deep with any consistency, the overwhelming majority of his catches were short throws. He only averaged 13.3 yards per catch. So, he contributed 73 catches, 5 TDs, and almost 1,000 yards without ever really succeeding at his "one trick".
I never saw a significant problem with his route-running this season. I saw him runs tons of routes where he was wide open and Tannehill missed him.