Several of the spells being introduced with the druid class, also fall on other spell caster lists.

To me it seems fair to be adding in the new spells to the current classes, if the class is normally capable of casting this spell in pnp.

Bards, Wizards and Clerics all have spells in common, and share spells among their lists.
I feel the same should be true for Druids.

If Druid is to be the exception to this rule, I would be interested in knowing -

Why this is.
And if the this is subject to change.