Normally when you put in epic destiny points / enhancement points / etc. you can spend as you want and then close/cancel OR accept to confirm the points allocation.
With the new system, this behavior is only there some of the time. Sometimes when allocating a point it will auto confirm it (meaning if you spent points to see what the 3rd tier offered in it, you'd have to reset the tree to get the points back.
Primal avatar in particular seemed to be a big culprit of this particularly the abilities where you select an option from a variety of choices. I didn't get a chance to test further as the devs decided to not make resets free when the release is as buggy as it is, and I'm not doing QA for free that's also going to drain in game resources.