I tried to get an image of this but I built up the tree and at about halfway up maybe there is a spot where you can just enter the tree and the tree physics pretty much just stop, not sure why that is but I hope that gets fixed.

I know that there is a spot above where the tree does exist again though because that's where the bee lands on the branch, which also, WHY IS THAT SOOO HIGH???? I don't really want ziplines back but I really hope you can add like butterfly wings or something to try to be able to fly / glide, I feel like if you just add bees the game would be too easy, but like if its like flying but they can only go up so far then i think it would be a lot better.

There is a valid reason for the tree, thats due to some memory reason, basically having a massive hitbox encompassing the entire tree will use a substantial amount of memory, so have it part way up, 99.9% of players won't build that high. As for the bee, yes it lands on a branch but the hitbox there is floating, G1 is exactly the same with the Oak

TL:DR, its a memory thing 

If the reason this wasn't fully fixed was memory, I would prefer it to go back but thanks for fixing it in the latest update. The game now runs much worse over all but I do see that this is fixed.

The oak and the house had the same thing in 1.  I built a very long ramp to the top of the house as a possible base, but when I tried to stand on the roof, I fell through it.

There are mushrooms part way up the oak in 2, which suggests the developers think we might build up there.  (And I did). 

The other problem with the oak tree is that enemies get stuck inside the roots.  They can attack me from in there, but my weapons bounce off the tree.  

Idk if something changed between when i last commented and now, but the game is running for me on the tree and i hit the skybox and its not as high as the tree is tall, devs please fix lol but also thank you devs for allowing me to make a little grass castle in the sky.