Well, by your view, I suppose it's in keeping with the flavor. But understand that going by straight SR, Lofwyr knows exactly what the Jewel of Memory is and does, and he wouldn't let metahumans within cannon shot range of it; he has no need for Saeder-Krupp (not 'Satyr') to 'research' it, because what it is is what it says on the label - it's a massive jewel that stores memories, specifically draconic ones. It is, in essence, the definitive history book for dragonkind.
Screwing around with time, whether that's 'creating a Nexus' or even limited time travel, is just setting a match to a fuse of indeterminate length leading to an unknown powder store. It may blow up in your face; it may do nothing. Time travel and teleportation are the two core 'impossibilities' of Shadowrun, but try to think about what screwing around with time travel can wind up causing - problems don't just multiply.
But like I said, hope you have fun. It isn't what I'd play, but I'm sure that if it's interesting to you, you'll enjoy it.