Is that a limit of 10 you can have uploaded at a given time? Or just 10 you can have on the local docket? If it's just a limit on local slots could you technically upload to the server? Or could you team up with someone else to save some of your finished rosters locally on their own so you're not reliant on the servers alone?
Either way, your '84 roster has been sharp so far. Finally got to get my Era started and it's been a ton of fun.
As for your plans moving forth, if you have to start prioritizing what you do, here's my personal opinion of importance:
1. Rosters for each starting era (1984, 1992, 2003)
2. Drafts for each starting era (1984, 1992, 2003)
3. Subsequent drafts extended chronologically from starting year
Lastly, if you can vouch for any non-OS rosters/drafts, could you throw those names out there?