An allocation percentage needs to be applied to only one of several dimensions that are assigned to a journal or document line. Whenever an amount is entered to an account, one of the dimensions requires allocation by percentage while the others do not. Allocation Accounts could work if it would be possible to select a Destination Dimension Type of "Inherit from Parent". If this is selected on the line along with a dimension code, the Dimension Value of the parent line would be used/preserved.
This would allow companies that need to allocate expenses across multiple dimension values for select dimension codes assigned on a line to use Allocation Accounts. Currently, these allocations need to be done manually.
If you make this change, assigning an Allocation Account No. on the Recurring General Journal using Recurring Method BD Balance by Dimension will become more usable for users that do this monthly based on a set of dimension filters applied to a specific account.

Business Central Team (administrator)
Thank you for this suggestion! Currently this is not on our roadmap. We are tracking this idea and if it gathers more votes and comments we will consider it in the future. Best regards, Business Central Team