I disagree with GGGs sentiment of not letting us respec or at least disable atlas nodes.
To preface this: yes, one should read before they pick the nodes and one should not pick those ones that are not beneficial.
However, you do have to go on either side to actually get the worthwhile nodes and notables as certain ones are not obtainable if you were to go from the east side for example.
I have unfortunately bricked my atlas tree by taking a node that has a chance to transfrom my essences into Rogue Exiles which is really bad and annoying when i am trying to lure 6 wisps to a boss.
They have stated that it would make players switch atlas nodes between maps to get the most benefit. This is just wrong in my eyes. Sure there might be some which do do this, however your high end farmer is not focued on switching atlas nodes let alone bothering which biome his map is in. Efficiency is key if you are juicing in end game.
And if people want to switch between nodes to potentially get more then let them, whats the big issue here, Isnt the point to let players have agency over the Atlas Tree?, divines are already dropping like candy and you actually progress decently even if you are a casual.
You could also add a somewhat high Gold cost to respec so that people can switch if they want to farm a certain mechanic more but still keeping the cost high so switching around every second map is not possible.
Just my 2 cents.