Well a month ago he was already home, having friends over, and wheeling himself around. If necessary I'm certain the writers can make changes to the plot and scripts due to any physical limitations. The show recently announced they have this series mapped out for another 8 seasons, all to be filmed in Pittsburgh. Sounds like they anticipate he'll return in some capacity. I have my doubts, regardless of health, that it'll last that long though. But that's just my opinion.

I worked a 16 hour day as an extra on MoK last summer. The overwhelming majority of that time was spent sitting around a tent city prison in the August heat. The stars spent that time sitting around in air conditioned trailers.