Replying so this doesn't sit at the top of the page.

Yes, I drew a pocket door that could be, I believe, up to 30" wide but in my comment above I mostly wanted to tell you that you and I had the same width around that area .i.e. 4 ft wide shower and 2 ft deep closet which left in both cases 3 ft for the door. Probably a regular door is better than a pocket door and I think a 30" door should be enough. Also, if you want, you could have a cabinet inside your bathroom. ... you can reduce the 4' closet to 3' long and reserve a foot facing your bathroom. Unless you are very limited in your space, I would try to make the shower 3' deep. Even though a tub is 30" wide and you can shower in a tub, the fact that you have a glass instead of a shower curtains make the shower feels less spacious. I believe some stores like Home Depot have inserts that you can use to replace a tub. Those showers are 5' x 2.5" (just like a tub) and have a glass. You can go and get inside the sample on the floor and see how it feels.

I still like no. 1 better but before you go ahead with this dimension of shower, for precautions, I would shop for vanities just to make sure you can find one that size. Also, for me, an 18x32 vanity would be too small. It may not for you but I suggest that you compare what you have right now and see if you would be satisfied with a vanity that size. The drawers might be very narrow. All of that may work for you but it does not hurt to check before you commit. If you find the vanity too small or you can't find any of that size, you might have to change the angle of the shower. You can also have a custom made vanity, but also check if you can find a sink the right size for that vanity. Also, if you find you have not enough storage you may want the cabinet I suggested in the bottom left corner. In that case, I would put a sliding door in the middle of the bathroom (not to the left. Your plan as you have it now might well work but there are precautions worth to checking before committing.

It's a lot of closet! Do you need that much closet? I honestly wouldn't even know how to fill that much closet. You have hallway access to that room. I see you already have a craft room but don't know the rest of your floor plan. Could you use half the space for a study? Office? School room? Library? It would just be an overwhelming amount of closet space for me, but maybe I just don't live the kind of life that knows what do do with that much closet space!