As recently discussed in chat, we have a relatively small number of users with sufficient reputation to process the review queues for close votes and low quality posts, and a smaller number still who are actively engaged in the review queues. This means that items are stuck in the review queues for far longer than is healthy.
In the past (although very rarely), the rep levels for such privileges have been temporarily modified for some new sites that are not yet ready for the standard public beta rep levels. For example, this happened with Quant.SE last year.
Is this something that our site would benefit from, to ensure we can review quickly while we continue to build our scope?
Currently, voting to close requires 500 rep. This means we have 17 users who can work the close vote queue. We have 19 users who have previously worked the close vote queue, of whom 6 active users (non-trivial rep) have rep below 500 and are no longer able to do so since we reached public beta. So it seems likely that there are at least a few people who would be interested in reviewing if they had the privilege, in addition to any others who never had the chance to review when the queue was sparse early on. This backs up the expressed desire in the chat transcript linked to above.