Kuharsky suggests because of Keiaho's small build, the Colts will replace him with Clint Session. Lets back up a second. It was my understanding that Tyjuan Hagler and Clint Session were battling it out to start at the strong side.
Keiaho has started every single game he has played in the last two seasons, and makes up for his lack of size with his intensity. Keiaho has a similar build to Colts middle linebacker Gary Brackett. Brackett is a unrestricted free agent after the season, and he might not be resigned.
Were Kuharsky's theory to be correct, Keiaho might have a future at middle linebacker, but that clouds the story of Keiaho next season. To me, Session is a passing down linebacker, and Wheeler is a run down defender. The Colts best option might be a rotation.