Depends on the shard imo-
Shore brings crit immunity which hurts jtr and an extra heal that hurts NS. Crit immunity also annoys CLS teams, but it doesn't totally nerf wreck their offense. But as you pointed out, he needs a turn to really do much other than absorb the first dispelling skill. I use the same team as you but with Shore in for Thrawn.
So I'd say depends really. SiT is better if the tank is gonna sit there stunned, Shore is better if against some teams IF he can move