The math on the karma cost of playing as a dryad seems wrong.
The statline is almost identical to elves. The only difference is that their maximum strength is reduced to 5 instead. If we stack glamour and symbiosis on top of a baseline elf, we come up with a total karma cost of +7. Which means that according to the figures in Run Faster, you are paying an extra 43 karma to be a dryad over an elf with glamours and symbiosis (admittedly, the elf will probably have more metagenic qualities than that. It will still cost less karma than the dryad), not counting what effect your reduced maximum strength would have on the cost of the template. Note that a dryad's maximum charisma is listed as 8, which is identical to an elf's.
It gets weirder when you look at where dryads fall on the priority chart: despite costing 90 karma they are set at Priority D. Which is identical to where elves sit on the priority chart. Something is amiss here.