crewboi83
I think your concern of leaving doors unattended is justified! It is not logical at all to have 2 CC at doors 1 and none at doors 2. In my airline we have too the CC in charge of the back to read the demo and Purser + number 3 performing, which seems a more logical way to cover all the doors! We also had a Safety memo to remind CC not to leave AFT doors unattended during the boarding and taxi, because some Pursers asked the number 2 to help in the cabin with boarding. Now we are requested not to leave the AFT galley unattended (let's say that there is a tolerance of 2 or 3 rows down the cabin).
You could write about your concern and suggestion to your Safety Manager. I suggest you write it so as to leave proof that someone raised the issue.