By my reckoning, in all published materials (including Witches and Warlocks from Witches Song), there are:
Basic: 54
Intermediate: 23
Advanced: 10
Expert: 7
Heroic: 2
To me, clearly, we need more careers at the upper tiers.
Beyond that we need more Wood Elf and High Elf careers as their options are limited.
There are work-arounds for these issues. I allow careers not open to wood elf to be "reskinned" and made open, for example. Still there is much more material in both those areas to plumb to create careers (different wood elf kithbands, regions of Ulthuan, the magic of both cultures etc.)
Others' views?

. Of course it will lack the "Official" seal, but that does not mean that the quality is not good.

It cost me something around 2 euros for an A4 sheet which I stuff full of cards.