Sorry if this is a bit lengthy.
I think it needs better marketing from both you and the agent, if you are serious about moving. A big unusual house needs more attention in photos, descriptions etc. Someone would have to be a detective to find out much about the house never mind the good points.
Why is the estate agent based in Manchester? A local agent who would make an effort would be worth their fee.
Who is the target market - Glasgow commuters, families, does the listing explain the advantages of the location? Is there a secondary school nearby? People are normally selling to younger buyers (Your family grown up, theirs just starting) so what will appeal to people 10/15 years younger than you?
The floor plans need to be uploaded as two separate ones so the details are legible. Every room should have a name and the photos captioned with the same name "Dining room", "Master Bedroom" etc.
The listings need to have proper descriptions and sizes of each room, I can't believe how lazy it is. Windows, radiators etc. It needs to be done efficiently as it could be repetitive. You have clearly kept a lot of original features that should be mentioned. I would say they have too many photos but not enough words. You don't need multiple photos of all the bedrooms. I'm also not convinced it's beautifully presented, although very clean, it would be fairer to say with potential for further sympathetic updating, especially on the bathroom front.
The main photo doesn't show the house clearly, is it all front garden or does it even have a back garden? There should also be a picture which is nicely composed where the house fills the frame, the front and back, even if you need to climb a tree to take it. Where's the front door? I can't even figure out the location as the satellite photo is fuzzy, is it up a private shared drive? Is the zoopla pin even on the right house?
The house is clean and tidy but you are right it doesn't feel homely. All the curtains should be hang straight and be arranged so they don't look thin/tucked behind radiators. All the divan beds should have a valance. Any unattractive everyday items should be out of photos - gym equipment, messy stacks of books, bins, children's paintings, loo mats, teenage boy stuff on wardrobes, throws on sofas. None of those sell the dream. But are easily fixed. It could then look more homely with a few very cheap accessories.
When we were looking for houses last year, if the basic house, kitchen, lounge and master bedroom sold it to me, the rest was not so important. However in your house I'm not even sure which is the main bedroom or lounge. The kitchen is quirky and I like the wood but it seems to have no storage and hardly any worktop - if you have a massive pantry tucked away, needs to be in descriptions. Also with huge rooms like the lounge, the usual estate agent wide angle shot just makes it look like a barn, they should frame it to look cosy.
So in summary you need a more coherent story and some home staging.
I'm partly talking from frustration as my sister is selling a beautiful (potentially) house in Yorkshire, but being sold empty and unloved looking so she will not get anywhere near the price she deserves. I hope you get your buyer, the location is stunning!