First be okay with the fact the bathroom tiles might need to be replaced. All of them. Replacing them in the bathroom will have the least impact on the rest of the house and whatever comes out in one piece, can be stored for future cracks. Maybe you can find a similar color but a different size, so it won't look too awkward, just an idea. Taking out a cracked tile is quite easy. Put on some gloves and safety glasses and (carefully) smash the broken tile with a hammer. An old screwdriver or chisel will help you tilt the pieces out. Work from the hole outwards to remove the other tiles. Removing a good tile is nearly impossible. Assuming it is still glued firmly, I'd say impossible. But, if you want to try anyway, you'll need to mill out the grout and then figure out a way to lift the tile..

Bring the window down to meet the cupboard. Really lefty47 was right about not drawing attention to it. It is a source of light ,,, so no need to clutter it up. But if you took the colour out and painted the top of the cupbard to match the wall it ceases to draw attention to itself. Just because it is a horizontal space does not meant it needs something put on it. Note- With the cupboard being white, it also draws attention to itself … perhaps take that to the wall colour too and lift the pendant a smidge. So your pendant is the feature there. The cupboard … do yo need it? One way to remove what you are calling dead space is to get rid of the cupboard.

You might paint the walls a bold color you really love, but I would recommend staying away from wallpaper as it is costly and too difficult to change. I agree with another poster that wider trim around the doors would help, and I would suggest that you paint all the trim white and add crown molding and a mop-board along the floor-wall junctures. I love the wood-tone door and would keep it as an accent piece and for contrast. You might add large, framed mirrors to the walls to reflect light and perhaps add a console table with a fairly large lamp. An interesting print area rug also can add pizzazz to this space. If you can use the bold wall color as an accent throughout the house, it will help to tie the entire color scheme together and give your home a unified look. In the offset hallway shown in Photos Two, Three, and Four, I would suggest you place a desk and chair and/or perhaps some bookcases and curio cabinets to make an interesting entrance way that can double as a study or home office. As an alternative, you could place a narrow dining table with leaves that fold down to allow easy traffic through the hallway. Above the table you could display some framed mirrors and, in matching frames, family photos that can serve as conversation starters. When you entertain, the fold-down dining table could be pulled out and/or moved to another room to accommodate your guests.

We have a 900x900 shower and it's plenty big enough. Neither of your proposed layouts looks that great, to be perfectly honest, sorry! In the first layout, you could improve it quite a lot by swapping the toilet and vanity (centre the toilet under the window on the bottom right of the picture if possible), and having the shower door on the other wall (beside the door). Then, you could have a towel rail on the wall beside the door (i.e. behind the door when it's open), which would be accessible from the shower but hidden when the door was open. An 800x1200 shower might be a good size for your space. You'd have to choose a toilet that doesn't protrude too far, plus a narrow vanity. With that layout, you could have a long but narrow wall-hung vanity, with a big mirror covering the wall between the windows, which would make the room feel bigger and would give a good amount of storage. Also, you may find this helpful: http://www.houseplanshelper.com/small-bathroom-floor-plans.html?utm_content=buffer4aa20&utm_medium=social&utm_source=facebook.com&utm_campaign=buffer