This always runs the risk of diverting your attention too much by implementing too many features but, if done, can offer a good avenue of experimentation. This is kind of the best of both worlds.
If the unmoderated subs become a cesspool, we know moderation is needed. If they flourish, we know moderation isn't. This also gives a testing ground for other "economic policies" to iterate through features that will mitigate problems that come up.
Thanks for the update!