I've only completed two Exploration Ages with the new patch, but comparing experiences from previously, I'd say the Economic Legacy is harder only in the sense that in no game did I see or find enough Treasure Resources for more than 1 - 2 Civs to complete he Legacy Path, and then only if they really pushed to settle them fast.
Caveat: I am playing almost entirely on Huge maps now, so that travel times are as long as they can be. That means also that a percentage of the Resources are a long way from the Homeland, and while I have found a couple of locations where one settlement could garner 4 resources, most sites can get only 1 - 3. That means you need at least 3, preferably more resource sites, and that also means at least one of them will be far, far away.
As an example, just today I completed an Exploration Age play, and I had 4 'resource' settlements in Distant Lands. One had 3 resources, one had 1, the other two had 2 each. Two of them were relatively close to my homeland ports/wharfs, the other two were literally, Half A World away. I finished the Legacy Path with an extra 15 - 20 points by the end of the Age, but that's because with Continuity I had a half dozen Cogs ready to go exploring from Turn One and so got the nearest two settlements planted and generating Treasure Fleets by the 10th turn - much, much faster than I ever managed under the old system where Cogs had to be built or bought first and then moved to the Edge of the Unknown to start exploring.
So I would say the latest patch/update made the Legacy Path much easier to complete, but that's because of the Jump Start that Continuity settings gets you. There are still nowhere enough Resources for everyone - it is even worse than the ratio of Civs to Wonders in Antiquity, especially playing on the large maps with 9 - 10 Civs total and long travel times for the Treasure Fleets. With 1 - 2 more Civs than the 'Standard' maps were designed for, I cannot help but think that the generation of Treasure Resources doesn't quite keep pace with all the people now looking for them, both AI and human.