You are suggesting for them to use event ninjas where they still can milk people from their money? It makes sense they would add rares from treasures.

Just because they have been milked in older servers, it does not mean it can't be milked for newer ones, especially to the low paying players who can afford these types of ninjas instead of the ones that cost 10k+. Items is what should be updated in my opinion. Having the refine pack would make sense as it would all players.

It appears based on previous events, if you want to get frags for skillbreaks you either have to either buy or wait until it comes out for free and I don't see them changing this mindset.