Very unique. Hope you found it!

My parents had a similar style with Berber covers and if my memory serves me right it would be about late 60's early 70's they also only had Noblett furniture for their dining and lounge coffee and buffet tables oh boy they were made to last and still were in excellent condition when they passed away so sad to have to let them all go but we didn't need it whoever bought them at auction will be happy, they will outlast a lot of the 'ready access' furniture that's available today. I can't remember if the lounge suite was Parker or Noblett but the style is the same.

I'd say there's not a lot you can do with the garage, overall height limits and ceiling height to garage perhaps? Limited info and unfamiliar with site, etc. so just really guessing here. The stairs however could be changed as could the balcony, etc. Can't see issues here why it can't be amended to suit your requirements. You never mentioned the issues with the designer but perhaps stay with them as redesigning through another may not be ideal either! Some won't touch another designer's work and will start from scratch. Give them another chance to explain why it is all done this way. Allow them the opportunity to amend it and depending on your council, use a SECTION 96 if possible. Council will soon let you know if they can accept it. Remember they've been submitted so I'd have to presume you were happy with them beforehand. Clients changing their mind or have difficulty making decisions happens regularly as its all quite new to them. I too have had clients that love the plan's, get submitted then decide that want to change something that has been there from the beginning.... Windows and doors are usually what my clients change. Frustrating for client and equally if not more so for the designer as it affects the whole plan set and documentation in many cases. I do know many designers will railroad their clients into decisions based on their own visions but this is never a good thing. It's a collaboration between client, designer, council, engineer, builder, etc. and sometimes a bit of compromise by all parties.

Though I don't know for certain, I think the cotton/linen shades are removable. I wasn't able to determine this by my searches. This could easily be confirmed by making an enquiry to supplier before purchase. Alternatively, a handmade one could be made removable by making shade slightly larger than frame and making ties.