Unfortunately, heralds still suck...
On the positive side, now it is no longer near impossible to complete the chronicle. It's significantly easier to get the sunder charms. To find all 6 variants at least once, you need 15 drops on average.
On the negative side, the heralds are useless for anything else. Some of them are much tankier than the game bosses, and they tend to reward you with only worthless blue stuff. I understand that their drop rates had to be adjusted to account for their increased spawn rate, but the nerf is just too much. Unless you are searching for sunders, it's probably better to just skip them.
All things considered heralds (and TZs in general) still provide a frustrating experience, but for a slightly different reason now. I'd prefer if heralds were relatively rare, but with boss-like drops. As things stand now, you are better off grinding Mephisto (or Andy) if you want to complete the Chronicle.