Definintely enjoyed jumping puzzles in GW2 and really loved how they incorporated them into some of the main content so it didn't feel like just a random feature. I don't, however, feel that it would be a great thing to have in FFXIV as it suited the more arcade style of GW2. On that note though, I think any game that allows jumping should actually have some use for it aside from short-cutting a set of stairs. I personally don't want to see jumping puzzles in FFXIV, but I would like to see instances where it is required to access areas or avoid mechanics in fights (something like jumping off the main platform onto a side platform to avoid a charged attack).