I have read the many posts on this thread with some feeling. I have strong connections with Oswestry, and often travelled to and from it by train as a young lad. I am just old enough to recall Oswestry in full steam operation, pannier tanks on the Gobowen shuttle, and the couple of years of DMU operation. My grandfather was a carpenter at Oswestry works until it closed.
Emotionally, it would be nice to see trains again at Oswestry. But I cannot see a good case for reopening even the Gobowen to Oswestry section. Others have pointed out the issues that would need to be overcome to get trains running again.
I would add that even when the line as open, travelling by train onward from Gobowen many people would use the car or take a bus from Oswestry. Given that Gobowen and Oswestry are so close, I cannot see much additional revenue arising from operating trains to Oswestry. I don't think the train would cover a small fraction of the operating cost, let alone contribute to the cost of reopening.
I really do think there are better battles to be fought, such as the long-fought campaign for a station at Baschurch. This would be a much better proposition.