There is nothing wrong with the configuration. All doors are of equal size. The only alternative would be for them all to be hinged the same way, but then you lose the double opening and would reduce the openings to three narrow openings. Truthfully you are over thinking it. Worry about something that needs worrying about…..not this.

Example…looks good.

It’s a fairly standard set up. But have a think about what configuration with shelves and rails you’re planning on the inside. Make sure the interior functionality will match the doors l.

I would prefer to see two sets of doors which will give a wider opening to both sections, his & hers ?. This also reduces the depth of the doors when opened into the room, I have shown 1200 double doors but can be reduced if needed to fit with the cabinet maker. (my program won't do double doors under 1200)

What is the internal layout?

Do you mean my new door choice Kate?, as it's not the master bedroom it is most likely a single use robe, suggest L_R 1) Long hanging. 2) draws with hanging above.. 3) split hanging. 4) open shelves. But as always it will be up to the owner and her cabinet maker to fit out.

This layout is typical cheap way of doing it as it uses standard off the shelf doors that the carpenters can fit-out rather than more detailed and better appointed cabinetry. If option available I'd suggest considering 3x divisions, 6 doors of about 435mm - it's always preferred if possible to minimise cabinetry door swings into a room to maximise clearances - nothing worse than needing to have a double bed next to a robe and not being able to open the robe door properly

It usually comes down to cost, more doors means more expense it doesn't have to be boring using less doors, I prefer the 60 - 50 doors for a combined wider opening over the standard 720 doors that the designer has suggested which you can purchase off the shelf and are bulky 500 - 600 doors can also be purchased off the shelf as Robe/.Pantry doors which are less bulky.

As I previously mentioned a smaller door takes up less space when open.

Looking at the floorplan this is a single use room 3760 plus robe x 3920 which should easily accommodate a QB with the robe doors open.

Door widths may Depend on width of drawers etc. inside the robe.

@Kate, that is a very good point.

Keeping in mind that this is a cupboard which is only 51cm deep

Lots of off the shelf, no pun intended , Standard wardrobe inserts with drawers are less than that depth

As the space is only 51cm deep you need to consider using drawers without handles to maximise the storage depth, when using either off the shelf or cabinet maker/builder cabinets.

If you decide on 2 x double doors I would make them separate cupboards.

If you you consider Bifolds which open back to each side, this will allow for better configuration within the cupboard (no center spine) I would have hanging or shelves at either end, drawers need clearance to open.

I would also look at the height of the doors, normal 2100 would mean a bulkhead above them to the ceiling at 2400 which would need doors in the bulkhead to give access to any storage space.

Whereas 2400 full height doors using either double hinged or Bi Fold will automatically give that access. Without 2400 doors you won't be able to access the bulkhead space from within the cupboard.

I have done a couple of basic drawings to help explain what I mean,

Example of 2100 height Robe internal fit out showing the gap above to the ceiling which could be left like that with the 2400 doors, great place to store blankets and doona's.

I am assuming that your ceilings are 2400?