The truth can be told regarding my interest in Ursa. Someone High Up in the Traveller Universe kept asking if my interstellar circus would have bears.
You not only want to restore the Ursa to their previous numbers but also spread them further afield to help a novel?
The Ursa and Sydites are little more than the some of the stains T20 left behind because that ill-considered Traveller/D&D mash-up gave canon furries and four-armed orcs(1).
The Ursa could have been something, could have been unique. Even with the need for them to be PC-ready, uplifted or chimera bears could have been far more interesting than the Albedo ripoff that was presented. Given their ur-species, the Ursa could have and should have formed societies uniquely different from that of humanity, yet they're nothing but Bob the Brave Honorable Bear from Accounting making the Chief Joseph of the Nez Perce speeches you posted.
The Ursa are boring, formulaic, lazy, stereotypes but you want to spread them about to save two minor characters in the piece of fan-fic? Niven and Pournelle changed the orbit of New Chicago to keep one sentence in their draft of The Mote in God's Eye. Is your novel worth further inflicting the Ursa on Traveller?
By all means, restore the Ursa to their former range - but just their former range. There's no need to increase the scope of T20's mistake.
1 - The Sydites could have and should have been something unique too while still remaining PC-ready.
Given the need to control four arms means their very brains should have been different from other Minor Human races. As Wil correctly points out, having extra hands means you can more often hold your tool and your work at the same time. The Sydites could have been craftsmen and tool makers capable of exquisite beauty and precision, inveterate arboreal tinkers with better overall spacial reasoning than most humans, or innate engineers approaching the savant levels of Motie Browns.
What did T20 give us instead? Brutal, ugly, violent, stupid, four armed orcs.
Should we spread them further about too? Your circus must need roustabouts to raise the big top, shovel manure, and beat up rubes.