The units for the Wood Elves didn't get any new voice lines. Great Stag Knights use the Wild Riders lines, the bladesinger uses all of the wardancers lines except the one that says "Wardancers!". The Lost Knights RoR uses just a filter for Wild Rider voices on top. I can't check the Glade captain because it's not available to anyone it seems, so i can't say on that. The only new voice recorded aside from Legendary characters was the Spellweaver, thankfully that's something.
Why is this being cut from the new content? Same thing happened and still present for High Elves units on the previous DLC. Is it so hard to pay a 2-3 Voice Actors for 2-3 lines for a couple units? I don't get why this is a standard now.