I dont understand exactly how? Homepage has menus and there should be no menus on landing page. Why didnt you include layout for landing pages in your templates, since this is really important. Web pages are created to achieve certain goals (sales, lead generation etc.), and not for show-off. Besides that I tried your builder and it produces minimum of render blocking resources, all of them were quickly fixed with use of a plugin, and this is really rare. But you have to know that 99% of people are making websites to make cash one way or another, so some conversion oriented features wont be bad.
P.S. I avoid use of plugins whenever I can.