Shards and crystals did indeed drop from monsters in v1 and it was beautiful. So much better than grinding out shards and crystals via gathering. It made crafting so much less tedious when you could get crystals and shards from doing everyday things instead of having to grind out the shards and then grind out the actual components. Now if it were 1 crystal/shard a synth, sure that wouldn't be too bad, but when its 4 > 5 > 6 or even more, it becomes a lesson in tedium. There is a reason rmt make bank off of these items. It is simply nothing more than another road block for new players trying to make a little gil or who want to try their hand at crafting.
The true holdover from an old system is having to use shards and crystals in the first place, which came from ffxi. It's not a system you normally see in mmos or single player games because it simply makes 0 sense to have your players gather 7 items that are completely unrelated to the craft on top of the items you need for the actual synthesis to take place. It did make more sense in v1 because you advanced the craft by keeping the elements of the crystals in balance, but when they got rid of that, admittedly horrific, crafting mini game there was no reason to actually keep the crystal requirement outside of just being what was always done.
Having alternate ways to gather worthless or meaningless materials is not necessarily a bad thing, especially if they could make it fun and interesting. And when it comes to enemy drops, like skins, fleece, wings, etc. having an alternate system would be nothing but a boon. You know when you go to gather ore, that you are going to get a minimum of 4 ore per node. But when you go farm skins you can kill 10 beasts before you even see 1. And since it takes 2+ skins to make 1 leather, just like it takes 2+ ores to make one ingot, this disparity becomes even more obvious.
On top of that retainers can bring back 30 ores but only 10 skins, which makes 0 sense. So, again, having an alternate way to get some of these materials would be wonderful.