Is there really much difference?
Take each of the items on the img you provide and match it to the options available right now. I think there are a couple less in D2 than there were in D1 but it seems more to me the D1 design was a mess and for D2 they just tidied it up into sections; i.e. movement in it's own diamond at the bottom, grenades in it's own diamond at the top.
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You aren’t wrong but I much rather be able to pick and choose every option in the subclass tree but that’s just me
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It seemed like it had more to it. Now I am home I can see there are actually 7 items less in D2 so your OP isn't without merit if I am fair. I prefer the D2 organisation, but would also like a few more choices