Provision of 2 tph from Dore to Sheffield is desirable to make this service of more use as an urban commuter route. It is unfortunate that the main line platforms at Dore were removed many years ago, as this additional service could have been provided by Nottingham-Sheffield services that call at Dronfield. How difficult/expensive would these be to rebuild? In their absence, some of the fast Manchester-Sheffield services could call at Dore, as happens already in peak hours, but not (oddly) in the evening peak from Sheffield to Dore.
When there were two pairs of tracks from Dore into Sheffield, slow and fast with crossover at Dore Station Junction, it was simple to have services stopping at Heeley, Millhouses, Beauchief and Dore. Now there's only one pair.
London trains are more frequent today and so are other long distance services. Reopening platforms at all these stations would require reinstating 2 tracks down the Sheaf valley and that would be a major undertaking. The old track bed is mostly still there but bridges have been lifted, tracks slewed, railway infrastructure placed on it - and a small part sold off for a Tesco superstore. Electification will bring the opportunity to add a 3rd track and more loops but will it be done?
However the current bottleneck at Dore on the Hope Valley line means the EMR service crosses the Northern too close to Dore for them both to be reliably pathed to stop - although if they were both running on time it would. With the second platform that opportunity is much easier.
EMR may not see it that way. They are being exhorted to reduce the journey time between Sheffield and Manchester. Adding a stop adds another 3 minutes.
However such a regular stop would offer more through opportunities from Dore and siphon off users from Sheffield. Would it bring new custom to the railway? Would it reduce Northern's stopper loadings?
Given that a bus takes about 30 minutes into Sheffield from Dore station, and a car not much less, a 7 minute reliable train trip roughly every 30 minutes instead of hourly surely must be a winner?
Stopping the TPE service is also good, but it leaves Sheffield 3 minutes before the stopper for Manchester and Dore about 5 minutes after the stopper from Manchester to Sheffield. It doesn't help provide a half hourly interval local service.