I'll trade you quote for quote.

Here's the SRD spell
entangle with emphasis added:
I suspected we were just having a communication error. It'd have been a lot easier if you'd just quoted that in the first place.
Allowing for "impeded movement without entanglement" was what I was aiming to cover with the modified Woodland Stride proposals.
Woodland Stride 2 (Ex): A shroomling may move through any sort of undergrowth (such as natural thorns, briars, overgrown areas, and similar terrain) at their normal speed and without taking damage or suffering any other impairment. Brush and overgrown areas that has been magically manipulated to impede movement does not affect a shroomling so long as the effect does no damage. However, plants that are magically manipulated to injure creatures, or damaging plant spells such as wall of thorns, do affect shroomlings normally, including impeding their movement.
I still like the idea of them being slowed by damaging movement-impeders, but am OK with the most recent Freedom from Plants.
Freedom from Plants A (Ex): A shroomling is immune to entanglement by plants, including plant monsters (such as an assassin vine) or magic that cause plants to entangle creatures (such as the Druid spell
entangle). A shroomling may move through any sort of undergrowth (such as natural thorns, briars, overgrown areas, and similar terrain) at their normal speed and without taking damage or suffering any other impairment. Brush and overgrown areas that has been magically manipulated to impede movement does not affect a shroomling's movement. However, a shroomling does take damage as normal from plant growth that has been magically manipulated to injure creatures (such as a
wall of thorns).
Separating them into two SQs does still seem to be a good idea, of only for clarity's sake:
Immunity to Entangling Plants (Ex): A shroomling is immune to entanglement by plants, including plant monsters (such as an assassin vine) or magic that cause plants to entangle creatures (such as the Druid spell
entangle).
Woodland Freedom 1 (Ex): A shroomling may move through any sort of mundane undergrowth (natural thorns, briars, etc.) at their normal speed without taking damage or suffering any other impairment. Brush and overgrown areas that has been magically manipulated to impede movement does not affect a shroomling's movement. However, a shroomling does take damage as normal from plant growth that has been magically manipulated to injure creatures (such as a
wall of thorns).
Woodland Freedom 2 (Ex): A shroomling may move through any sort of mundane undergrowth (natural thorns, briars, etc.) at their normal speed without taking damage or suffering any other impairment. Brush and overgrown areas that has been magically manipulated to impede movement will only affect a shroomling's movement if the effect causes damage, such as a
wall of thorns) spell.
What do you think of the idea of letting Nookie pick one of the options and moving on? We seem to be spending way to long on this point, and it's not even something I'm that bothered by!
