I would like to propose a solution that most that I've talked to agree is a workable solution.
Problem Statement: Too many cores as a result of unlimited nested orgs. Players previously rejected the idea of removing nested orgs due to limited RDMS.
NQ proposed solution is flawed for several reasons. Loaning cores to orgs has too much potential for abuse and turns managing org shared infrastructure into a nightmare to manage long term. 25 cores per player is simply too little especially after the Demeter update requiring cores for mining.
Before I get into my proposed solution, it's important for NQ to understand how most players use orgs. Due to the limited RDMS capabilities, players create their own personal/small group org for players they trust 100%. They then join a larger org for the community and larger shared resources. The larger org typically maintains org member store, factory, space stations, etc. The primary org relying on "loaned cores" is an unnecessary problem for the legates to manage. The "personal" core slots are rarely used by players due to the RDMS mess. When my two friends and I started playing, the first thing we did was to create our own org so that we can easily share constructs without having to deal with RDMS hell, so until RDMS becomes much more robust, continuing to use the 17 personal cores to boost the total cores is pointless, hardly anyone other than solo players who don't do much beyond a very limited set of game features uses them.
Short term:
My proposed solution is to remove nested orgs from having cores slots and create a two-tier organization model. Orgs with less than 10 players would have a hard limit of 150 cores while orgs with more than 10 members retain the current 275 core limit. This would allow the larger primary org to maintain the necessary infrastructure without having to worry about what they will need to delete when a handful of players decide to leave. This also allows the solo/small group org to have enough cores to maintain their own constructs.
Long term:
There still needs to be a more robust system for alliances and networks such as the Utopia network. I believe using the nested org feature is not the right mechanism for this to work properly. There needs to be a separate system to manage alliances for future capabilities.
The current RDMS is sorely lacking in features to properly manage an organization and could potentially reduce the need for players to join more than two orgs.