The following are some important thoughts on various aspects of what's going on and, in some cases, for which there seems to be some confusion...
The "Legacy" game system has been eliminated. It has been replaced with "Other", which is almost exactly the same thing. There are only a few small differences between "Legacy" and "Other". The "Legacy" game system was what everybody had from the beginning, and "Other" is what the standard has now become for anything that isn't a very specific game system structure (i.e. Pathfinder, D&D 5E, or Savage Worlds).
You are NOT required to convert your realm to a specific game system. You can absolutely leave it the way you've got it tailored. That's the whole POINT beyond Realm Works - getting things exactly the way YOU like them. Game system conversion will allow users to fully embrace a formal structure that very closely matches a published game system. There are many users out there that want this. But that's ELECTIVE. The import logic incorporates the game system conversion logic so that content created with game system structure X can be imported into a realm that employs game system structure Y. Unfortunately, it seems there is a glitch in that logic that is plaguing at least a few folks at this point.
When you convert to "System Neutral", that's a completely different animal. The objective behind System Neutral is for someone who wants their material to be guaranteed to import into any other game system structure. As such, converting TO System Neutral will fundamentally throw away information that will often be wanted. The primary thing that gets thrown away is tags that exist for a given game system, but do NOT exist across ALL game systems. So I would always recommend AGAINST converting TO System Neutral, unless your plan on sharing content that is intentionally highly generic to work for ALL game systems.
I need to check with David regarding the situation with Legacy realms. It was my belief that all Legacy realms have been converted to Other now. It sounds like that may not be the case for some realms, which might still be reporting as Legacy. That may be meaningful and the source of a bug that we can readily fix. It may also be just a cosmetic thing where the name is reporting as Legacy still but the realm is actually behaving as Other. I won't know until I can talk to him about this. However, we're definitely going to be working to get things figured out and fixed as quickly as possible.
It definitely sounds like there is something amiss when combining both import AND game system conversion. Importing is complicated. Game system conversion is complicated. Weaving them both together is, well, complicated times complicated - read: ugly. So that's where it appears we'll be focusing our efforts this weekend.
For those of you who have run into issues, please send us as much material as possible to help us get to the bottom of what's going wrong. We'll be doing our best to get the issues investigated and solved - as quickly as possible this weekend.
Thanks!!!