1. Eco Augments:

"Many are the All-mother's foes. But we are her sword arm, her sharpened fang, her killing gaze. Drink deep, warrior, and become." - Greenspeaker Thelu "Gray" Oka

Eco augments would be an answer to bionics, symbiotic implants which root themselves into the subject's nervous system to replace or enhanced a pawn's natural abilities. Unlike bionics which can just be slotted in with a little surgery and some recovery time, these enhancements might need to be "Cultivated." Once implanted, the augment begins relatively weak but "Grows" with its user, perhaps even having a chance to "mutate" granting new abilities to the host based on their activities. (More armor for a melee fighter, keener sight for a ranger, access to a fungal knowledge-record for a researcher. Etc.)

2. Dryad Enhancements

"O, Child of Garaun. Shrug off your caul and emerge anew, you who carry the soul of our fallen. You who carry the will of The Mother. " - 'Welcoming Of The Dryad' Local prayer-song (Translated.)

It only makes sense that eco-tech would make Dryads Dryad-ier. In our own world, fungal mats can help trees process nutrients the same way our own gut-flora does. Perhaps eco-tech allows the creation of special fungal cultures which, when implanted into a Garaunlen Tree, create enhanced or new varieties of Dryad. Imagine clawer dryads with layers of biometallic armor brought on by harvesting heavy-metals from the soil. Or medicinemaker Dryads capable of producing near-glitterworld-level medicines.

3. Bio-Armor

"It was supposed to be a simple. Go in, burn some huts, scare off the primitives with a few shots from our 'thunder sticks' and get paid. Then the trees started talkin' and it all went to hell." - Seamus Liang-O'Malley, Ex-mercenary.

Suits of living armor have a lot of potential. I imagine they'd work a lot like living weapons, but rather than becoming turrets after they "Expire" perhaps they become augments or...

4. Eco Warcaskets and Vehicles

"In the infamous Scottish Play, three witches predict that a king-to-be will meet his end when a forest gets up and marches on his palace. At this rate, I'd hate to be wearing a crown about now." - Dr. Alma Belterra, Lead researcher for Project Mother.

This would expand on the vehicles and warcaskets of the VE mod-line. Living war-caskets could be the "Final Stage" of a suit of expired eco-armor. After spending enough time on its wearer, players might be presented with a choice to either re-plant the armor as a seed, or allow it to "overgrow" and permanently fuse with the host, creating a lumbering giant of fibrous muscle and resinous armor. These "War-hosts" might not have as much weapon flexibility as a war-casket, but could possibly be able to "Heal" themselves of any damage rather than spend materials and time on repairs. Or perhaps they would have more flexibility, able to perform planting or other nature-based actions while war-caskets can do little more than wait for the next battle.

Vehicles might work similarly, swapping out versatility for ease of regeneration. Or maybe instead of Vehicles, you could have Mounts in the form of huge, ♥♥♥♥♥♥♥ Dryads that can be ridden or left to their own devices.