Being a member of one of the many "homeless" FCs in FFXIV, I find it rather unfortunate that the company workshop and its collaborative content can only be accessed through FC housing. This is especially true now more than ever, since the auto-demolish for housing has been temporarily frozen due to COVID-19 so there are virtually no plots moving in the housing markets these days. This has made it so that any FC that doesn't already have housing has even less opportunity to obtain housing at this time, and has to wait even longer to be able to access this content. As a small, crafting-focused FC, my FC mates and I are missing out on some of the more appealing FC content (for us) simply by virtue of not having an FC house.
There are several fundamental problems with the housing system that make obtaining a housing plot a frustrating and exhausting process for most (whether for personal and for FC use) and there are plenty of threads elsewhere in these forums discussing them at length; instead, I'd prefer to focus on what I think is a rather simple solution that enables FCs to access the company workshop content: have the company workshop accessible through FC housing AND through the Grand Company hubs.
Much like our personal Grand Company squadrons, company workshops could be added as an instanced zone accessible through the Grand Company hub. Thematically, every single FC is already affiliated with one of the Grand Companies, so adding a company workshop to the hub would just be an extension of the administrative duties FCs already perform through the Grand Company. Even if it required spending company credits to build the workshop, or if your FC needed a certain standing with their current Grand Company, this would allow every single FC to access this content while still allowing FCs with housing to continue using the company workshops in their houses. Equal opportunity for all FCs to participate in this FC content!