As you might remember, there was actually a Nysha token in the first draft of Epic Tasks – I forget where the list was, just had a look and couldn’t find it (maybe it was only available to Beta folk) – but here’s one mention:
A potential slow and steady income of Nysha tokens would have been way more palatable, alongside the meagre and random drops from Explores, whether in that form or another.
Maybe they decided the Anu and Nysha tokens were too generous in the tasks, but forgot to re-balance Explore drop rates accordingly or add another source?