Assuming you like open plan ... I would do the following changes.
Create a big room out of the following rooms:
2. Dinning room
3. Entrance hall. (Never have staircase facing the main door - bad feng shui that)
Note: the living space and kitchen should be separated.
Then create a room with the following rooms:
3. And the space between Kitchen & Utility. (kitchen space, if it is an entirely big kitchen space, should not be bigger than lounge or living space - bad feng shui that).
Apart from Bedroom 2 (assuming you integrate the above) , which is above the kitchen (cannot remember the problem now), the rest of the bed rooms are fine with toilet above utility room.
oh ya ... main entrance door should not go straight to the rear door. This design means "easy come easy go" i.e. you will not be able to save money.
Ideally, staircase leading to rooms should be out of sight.