That main room shot seeing the scenery outside is much much better!
I know that you only have a limited time frame with your verbal offer on onwards purchase, and this isn't the best time to be selling a flat with no outside space as you know, but if this all falls through this would be my suggestion.
Over the November and December period I really would paint the whole flat white. Yes pink may be the new grey but you need as much light into the whole apartment.
I would definitely have a carpenter put doors on your hanging space to create a wardrobe as it ruins the look of the room.
Invest in lamps and large mirrors to throw light into the rooms and some statement pieces where appropriate.
Personally I would also change agent as your agent is doing you no favours whatsoever and there will be others far more used to upselling The Royal Arsenal which yours simply are not.
They have made no mention of the "aspirational" value of living there, near the water, with all the fabulous amenities ... they all need to be named and some shots shown. Their photos are truly dire and even you with a phone have shown the height of the main room. Loads of their angles are just wrong. The shot of your shower room is so bad it's almost worthless.
You know your type of market and it isn't your family with two children! It's young singles or couples who want the amenities, the location near the water, the facilities etc and don't mind paying as it suits their lifestyle.
You've done tremendously well to declutter with two children in an apartment but I would still try and get more out of the children's stuff especially from the shower and put in the boot of your car if you do new photos on a sunny day and/or when you have viewings.
Fingers crossed that you can pull something out of the bag, but if not tart it all up over the Winter and make it more aspirational and get a better agent used to selling these types of historic properties.
Good luck.