Once TL is gone, there won't be a way to have an archive of listings, since
ebay online deletes them after 90 days.
Sometimes, after I've offered something there for a while, I stop offering it and wait a few months (sometimes longer). I'll be very, very sorry to lose that option, unless they build something in like that into the new Seller Hub (but I'm betting that's doubtful).
Unless I'm rushing to get something new listed on
ebay (like I'm trying to do today, to take advantage of a listing sale), I will prepare listings through my database, so that I have an archive that way, as well as be able to prepare bulk listings for other venues, too. But the
ebay listings always seem to require some extra little tweeks, so once the listings are up, running and looking good, I make sure to sync them via TL so that I have an eBay-acceptable version.
As much as I didn't love it, I will hate to lose that tool.