This is a bug, because CG has previously claimed that the shipment LSTs will be updated by now. If it was not a bug, they wouldn't have listened to my earlier report about DCTs and BB2 missing from shipments, and added them in the next update (
https://forums.ea.com/idea/swgoh-bug-reports-en/missing-characters-from-coliseum-lsts/13383388
)
CG has previously given us 3 different timelines for when a character may be added into the coliseum store LSTs, and all of those have passed now. If the developers have promised a certain functionality to an item in the game, and that item is unable to do so, I would call that a bug (hence why this report was flagged as 'missing content').
The first timeline we received from CG is in their announcement post for LSTs, which claimed that all characters would become LST eligible on the one year anniversary of the START of their era. The screenshot from this is available in both my previous posts.
The second is the precedent of the spectre and jedi vanguard marquees, who were added in one by one as they became accelerated. Spectres were the first characters to become LST eligible following their initial release. While they were available in the pass before they reached the coliseum store, Kix's update to the coliseum LSTs has been delayed further than the spectres, hence this report.
The final timeline we have received is in the replies to my post about Captain Ithano, linked in the initial post above, whereby all characters from an era become LST eligible on the 1 year anniversary of the LAST marquee of that era. This was linked in the website provided by EA_Gunnar, and has now passed hence my report of missing content from the game.
This is also why I have repeatedly asked CG to provide us with a forum post to update us on their intended schedule for LST eligibility, as they are clearly no longer following the timeline originally laid out in their announcement.