Do you intend the new room designating to trial the 'decentralised' workshop system you once spoke of, in which the function of a zone is determined by the tools/furnature present?
I'd be rather surprised if it happened before Myth & Magic, as reorganizing all workshops likely would be a substantial task.
Personally I'd find it backwards to first set up a neutered zone, guess what e.g. a blacksmith would need, make and place the furniture/tools guessed at, and then, possibly, finally be able to access info about what the rest of the equipment required is. It's really a messy information accessibility issue. Of course, you could make a neutered zone and that would give you access to info about what workshops you can turn it into, and then onto info about what the mandatory and optional equipment is for each particular workshop functionality, but it would still be awkward. Setting up a zone and then select that it should become a blacksmith and a brewery would allow you to provide status info for the functionalities to show you what you lack, including if the zone is too small for the minimum functionality of at least one workshop, as well as if it's too small for the full functionality of any of them (taking what's already in the zone into consideration). "Full functionality" would mean the ability to perform all tasks, as there's likely no reasonable upper limit to the number of parallel tasks of a particular kind a zone could support (just add more anvils to support the tasks that require access to anvils).
Work zones that won't be restricted by a strict job queue will also pose challenges to the job flow control. You don't want one type of job to monopolize the resources, e.g. because it's the least resource intensive, so it will always grab e.g. the anvil when it becomes available, while the other jobs that also require additional workshop resources have to wait for all of them to become available at the same time. You (or at least I) also want to have some control over what the workshop produces, rather than placing 5 jobs with the Manager only to find that the first two years get spent on producing left socks, moving to the right ones only when all the 100 left socks had been produced (and then back to left socks as those start to get worn [yes, I know socks are produced as pairs, so this is an exaggeration]). This as opposed to producing one set of clothing at a time.