Building similar integrations will require, in your words, "focusing elsewhere." You can't have both.
I fail to see how your proposal would end differently.
Plus it was suggested that Mozilla do things to compete with Google's "Gsuite integration" - how do you see that working to begin with? Should Mozilla try to push a competitive office suite, or try to compete at an inherent disadvantage to Google, who already nerfs features of Google search on their mobile browser?