Play him. It's impossible to plan 4 seasons out, but with the way this team is being built, and with continued success on the recruiting trail, I'd fully anticipate having a suitable replacement for Yakwe 4 years from now.
The scramble ends beginning next season, and it would be great to be competitive at the highest level at that time. Getting Yakwe comfortable with the speed and physicality of the game in an otherwise lost season accelerates future stability and success.