P: Add 8x10 softcover option in Book Module

Please send this suggestion to the highest level: I've exported many books from Lightroom's Book MOdule to  Blurb. What's missing is the 8x10 trade (softcover) option. The 8x10 hardcover costs me from $60 to $140 depending on length of my book. Even with the 20- 30% discount blurb offers me (so I can buy in bulk)  I'd be charging more than the market can bear.   On other hand , the magazine options and Blurb's softback trade options (designed through theri Bookwright templates) are reasonably priced. PLEASE add an 8x10 paperback to your options! By the way, the book module has never been improved since I've been using it (10-15 years, I bet). Isn't it time? For example, how about a way to lock in the positions of your photo and text cells? Or a proper ruler?