My thoughts, @CinnamonSwirlLatte ...
Firstly, I'm sorry you're going through this. It sucks being stuck in your situation. Your ex is a prat.
The photos are awful. They make rooms look dark and uninspiring and show no consideration of staging, lighting or angles. They need re-done by someone competent.
The 4th upstairs bedroom is very small. It might be more attractively marketed as being a study (with the bonus of being big enough for a single bed if needed).
Irregular rooms would put me off instantly but can't really be changed, but they could have the furniture arranged in a more attractive way.
The playroom looks like it's only accessible through the utility room, which would be off-putting to me and detracts from its potential use as a bedroom. If there's scope to reconfigure it with a door off the hall (by purchasers, not you!), a picture showing that there's space to do so could be useful.
The garden is depressing. It's described as beautiful in the description but just looks like the ex cba to do anything with it. While there's not a huge amount that can be done, some external staging with potted plants, even, might help. And change the description from beautiful to one that says it's a good size and has potential.
The description is awful and needs completely rewritten. Preferably by a professional or at least someone who understands how to write to present something in a good light. Keelby's in a good location - balancing access to beautiful countryside and outdoor activities with commutability to Grimsby, Lincoln, Immingham and Hull. You're about a 10 minute drive from Caistor Grammar - why not put that in?!