"One guy who was working on it left" is a lazy excuse, because that is not what I was told.... personally......

https://forum.square-enix.com/ffxi/threads/56550

MON is already a system which is implemented. Just like XI is already a game which many people left, it can be improved upon (Or devolved.....). There is literally stuff they can add to MON by Spring if they wanted. Finish the species, add a way to earn valuable currency through them......(ROE).

XIV nearly killed SE, then Avengers kind of put gas on the fire. Thus, they are tight with money imo. It is not like fans are asking for a brand new 2024 mmo.

As for BLU, I can see BLU getting some more spells. A correlation between it and MON would be pretty neat though.