I don't think feedback is generally helpful to the seller unless it is something major that the vendor can 100% change and is putting every viewer off.
There is nothing you can do about buyers who want a 4bed but have looked at your 3 bed to see if there is scope for adding a 4th bed at a later date. Or who really want a garage but might be willing to compromise if the outside space allows a decent size shed.
Even with photos and floor plans, sometimes when you actually get in the space you realize it actually doesn't work for you. Especially annoying when EAs use wide angle lenses which make the space look bigger. I've viewed houses and when I've got in them it's ridiculously obvious there is a huge shortage of functional storage space and the owner has rehomed a lot of general stuff into their cars/ families garage.
Then there are other elements you have 0 control over; neighbours, neighbours parking arrangements, noise levels of neighbours, neighbours barky dogs, speed of road, what direction your house faces, if someone has a huge tree, if due to the biblical levels of rain your garden looks like a swamp.
We've had a visit earlier this week from our direct neighbour who is trying to sell the house next door. House next door is 4 double bed, detached, double garage, parking for 3 or 4 vehicles, south facing low maintenance garden. The house down the road (identical in plot size, room sizes, parking arrangements - all 90s new build identikit style houses) sold within 3 days of going on right move and had a bidding war. Neighbours house is not selling - the only difference is neighbours house has sitting tenants who the council have advised not to move as they need a 4 bed house and the council have 0 of that stock. Seller desperately wants a sale before RRB comes in. Anyway, seller has gone round all neighbours asking all sorts of demands as a result of his "feedback" from estate agents. Not one piece of feedback, other than the buyers wanting vacant possession he has control over. He's asked us if we can chop down our tree (no it's perfectly healthy and has a TPO on it, tree is going nowhere), can we please remove our business listing from our house from Google/ apple maps (no, it's been there years, we have all the correct paper work for it). He's asked our other neighbour please can he not tinker with his classic cars whilst the house is for sale - no it's his hobby and bothers no-one else on the street, he does it between 10am and 3pm and takes them out for a drive on sunny dry days rather than having them ticking over. Can the neighbours that back onto us please not let their barky dog out (barky dog is annoying but is actually their son's dog and only comes when the son's family visit or the dog needs pet sitting for holidays it's not there all day every day). According to the caretaker at the care home, he's been down to the care home and asked if their staff can not park on the road as it blocks sight lines from the drive (cars are all taxed, MOT'd and for the most part are parked legally). Can the neighbours opposite us please not let their DIL park in front of their house when she visits or let their son tick is motorbike over for hours at the weekend. The street busy body has had a field day with the requests - mainly retired street and street busy body had to come round and ask us if we had had any ridiculous requests, whilst passing on the requests others have had.