MIN is one of the 2 jobs I actually play regularly and I haven't even bothered with doing favors (though I do have something like 60 tokens right now and all red scrip gear for MIN). I'm not exactly sure why, but the system just doesn't appeal to me. Really the collectibles system in general doesn't appeal to me greatly. They essentially created a leveling/ progression track for crafting and gathering that removes LOTS of materials from the market. I feel like I do a healthy amount of gathering, but I almost never gather anything that's usable (for crafting) anymore.
Legendary/ unspoiled nodes and the like are/ were ok... but I think I'd almost prefer that any of those items just be fairly rare hidden items on normal nodes. It feels very strange that gathering while leveling (ignoring collectibles) or for specific materials is very relaxed and casual, but gathering endgame is all about keeping a tight schedule and teleporting all over the world at the right times. Well, I suppose the schedule isn't that tight. A lot of hurry up and wait going on while we recover GP and wait for the 2:45 window to open.
As far as the way they handle scrips going forward, I'm not expecting things to change much, let alone change to how I'd like them, but I do hope that they just remove favors, or at least provide crafted gathering gear so that gatherers don't have to choose quite so strictly between gearing up or using favors. And really, just put the actual item needed for crafting on the node. Why bother with this silly 10:1 trade system for already heavily restricted items?
In ARR (2.0 - 2.....3?) the best crafting and gathering gear required really rather insignificant amounts of unspoiled node items and some pieces didn't require any. Maybe that was too easy, but how did we make the jump from that to this!? I guess it was too easy to be self sufficient before and they wanted to enliven the market, but I think it mostly just made people work harder at being self sufficient and get pissed off.