How does member of multi-member LLC reports their own expenses for LLC? This link
What's wrong if one does it in Schedule C? Schedule C has a link to form 8829, so you can easily compute the expenses, and they wind up on page 1 of 1040. By using Schedule E you have to use the worksheet in publication 587, and report other expenses in your own forms, and then only the end number shows up in Schedule E which gets eFiled.
The LLC has business use of home, travel, supplies, etc.
Also, adding the expenses to the owner's capital account just decreases the capital gain when you sell, which makes it a 15% deduction years from now. Whereas when it is deducted as a current expense, it is worth more now.