I honestly doubt that people would enjoy watching a Joel look-a-like on the show. It would be like SQEX's Avengers game, where everyone looks like a B-movie version of people you know. We already saw Joel in the game acted out with detailed motion capture, and already basically watched the movie.
This guy's a good actor, and really the more they break away from the game, the better. It's going to have to be its own thing in more ways than just casting. If you liked the original, this is just an alternate version and you can watch it or not. But if you go in expecting to just rewatch what you already saw, you're going to be disappointed if its different, and disappointed even if its a carbon copy.