Microsoft Loop -Comments and Restrictions

Morning, we are rolling out Loop across our tech estate as a replacement for Dropbox Paper but have come across a couple of issues I wondered if anyone knew the answers to...?

Can you restrict the creation of Workspaces, it seems that you can do this but it also means users cannot see workspaces, is there an option for users to view workspaces but not create them?

Can you add comments to formatted sections (for instance tables or quote boxes) in the same was a free text?