Hi Luke,
1. I removed the Blocks using this code :
https://onpointplugins.com/disabling-woocommerce-blocks/
Other way is to install Pro version of :
https://wordpress.org/plugins/disable-dashboard-for-woocommerce/

3. For testing purpose I deactivated the footer on home page and I have still a dom that is too big. I moved from to 1340 to 1152 so basically the footer has a size of 188 elements. Any ther advise

4. Using pagespeed you will get the size of script evaluation time that has to be reduced

See screenshot that covers both Dom Size and Script Evaluation time.

You can test now our home page without footer.

Best Regards