If he is as talented as advertised, and, more importantly, as talented as he apparently believes he is, Kiel will want an opportuity to play more than one season of college ball. NFL teams typically place a higher value on multi-year starters due to the wealth of game experience, as I'm sure you know. Sitting behind Golson who has three years of eligibility left may be something he does not want to risk. If Kiel doesn't leave now, the strategy of starting over somewhere else pays him diminishing returns going forward.