I actually flew ESB-ABZ-NCL in 2019. I was on a work trip to Denmark but there was no late afternoon flight back to Amsterdam from Billund so I took the Loganair flight from Esbjerg to Aberdeen and back to Newcastle (on one ticket). I would have used the Teesside flight if it had been in operation.
Esbjerg airport makes Teesside look like Heathrow. There was a small cafe and car rental drop off but they didn't even accept mobile boarding passes at the gate. I think I was the only non-oil rigger on the (pretty full) plane.