Here is another option for a roomier, plush foot stool which looks more professional. This could be used in an office or in a home where the decor was more streamlined than what we see pictured in the image above. The neutral color adds to the professional image of this footstool / chair combo.
Like the built in bookcase and drawers. Consider doing something in the space left when we move the old garage service door, i.e. next to the first floor half bath and maybe disguise the basement door with a built in.
What I love about this space is the great chair and footstool that you have here. The rest of the space doesn't matter so much. What matters is that you have one little comfortable spot in the home office where you can kick up your feet and relax a bit throughout the day. Nevertheless, it's professional enough to be suitable for clients to visit and to be unlikely to reduce productivity. In contrast, working from your bed can really take away from the urge to work!