Mr. Saucy (and everyone else advocating for Samara Tree builds), just what advantage do you think Samara Tree has over Vine Tree? I'm honestly curious, since the only reason I would use a Samara is if I wanted to shoot myself in the foot.
1) If you don't use a vine marker during a round it is doing nothing (other than allowing you to reach further with your spreading vines ability). But if you don't use a seedling pod during a round it continues to channel and becomes more powerful as the game goes on. I can give an example. There was a game where I had a seedling pod in a zone but later the action moved away from that zone. I thought the seedling pod was useless. But then that pod reached 6 mana and I realized I could spend just 1 mana from my supply to deploy Etherian Lifetree (I was playing against a Necromancer so this ended up being a good idea).
2) Seedling pods work well if you want to go heavier on conjurations than normal, especially cheap conjurations like bloodspine wall, tanglevine, mana flower, etc. If you aren't big on conjurations and want to focus on creatures, which a lot of players understandably choose, then stick with vine tree.
3) Seedling pods can lead to "big" turns. For example, say a pod deploys a bloodspine wall (0-1 mana from your supply) while an adjacent pod spawns a thornlasher (0-4 mana from your supply) and then you use your QC to cast rouse the beast on the thornlasher. And after all of this action you still have your main action marker to perhaps meditate with meditation amulet, move into a better zone, summon a creature, stuff like that. Vine Tree doesn't offer "big" turns. Instead it offers consistency and speed.
4) As the earlier example demonstrates, seedling pods are excellent at saving actions. And there is plenty of evidence that actions are just as important a resource as mana.
5) Seedling pods maximize your aggregate channeling (your tree channels, your pods channel, and you channel).
6) This is the weakest argument but I think samara treed and seedling pods are "more fun" than vine tree, especially if you don't have to win to enjoy the game. Samara Tree and the pods really embrace the druid's themes, and if you are anything like me you enjoy playing thematically... maybe even when you realize it may not necessarily be optimal.