Dynamis doen't greatly affect the economy anymore. You can just as easily get gil from gold boxes in abyssea (34k to NPC augmented dark rings anyone?), and because it's not done that often anymore, Dynamis is no longer the major gil sink it was at its inception.Here is something that I don't think a lot of people realize. NOT ALL but a fair portion of the in game Economy IS Affected by Dynamis.
As far as not broken dont fix- Just because it was a popular event, doesn't mean it wasn't broken or didn't need fixing. Everyone hated the scheduling and conflicts and getting "jumped" by enother LS that wasn't willing to negotiate. I for one got real tired of not being able to do the runs we wanted to do. This greatly solves the dynamis problem by letting people more or less go when they want, with however many people they want, and not get locked out because someone else wanted to do the same thing as them.
Any actual effect on the economy that you're implying will be slight at best, for reasons I've stated above. Abyssea easily takes its place for gil generation (as abyssea actually generates gil unlike dynamis which takes some out and redistributes the rest) and dynamis already lacks it's gil sink capacity because it is not often played anymore.Do you not understand that it will NOT be good for the economy?