@aidz and @jarda
I am not sure why it's so big either, therefore I gave her a call. She told me that is the size indicated on the site settings page, under Total Asset Size. It includes fonts, styles AND backups ... so maybe that's why it's so high ... the site itself probably isn't.
Though, her sites are usually at least 80 pages and very graphic heavy because they are either big eCommerce enterprise sites for retail or photographers. Once it reaches over 80 pages the designer does start to lag.
I asked her if she's compressed the photos she said she does. Though, a lot of her design consist of special and complex effects ... eg. 3D transform ... therefore that could be one of the reasons.
Back to me ... I am starting over again on my project and there seems to be no more issues whatsoever.
After doing some research, I had a feeling that it had something to do with the numerous class bugs that were reported numerous times on this forum. Because I use a lot of global classes to organize css and webflow does not encourage that,thus the bug prevented me numerous times from removing, renaming and combining the classes.
I would now be extra careful.
Thanks @Aidz, @jarda, @samliew and @Waldo for offering reassurance, project review, guidance and help.