Current talents are a major missed opportunity. Because there are so few of them compared to old talent trees they should be more impactful. Stuff like streamline, master marksman, and calling the shots is very boring.
Instead what they could do is make talents that allow you to build a playstyle similar to older expansions. Say you pick all talents on the left and you end up with a playstyle similar to ranged SV with focus on stings, black arrow, explosive shot, and lock and load. Go down the middle and you have a playstyle similar to pre-legion MM with a focus on chimera shot, kill shot, and aimed shot. Talents on the right would make a legion MM playstyle with focus on the vulnerable mechanic. One talent row should let you choose your mastery, one for old SV mastery (increasing magic damage), one for wild quiver, and one for WoD sniper training.
Every spec has gone through so many iterations over the expansions, there should be no problem finding three of them for this hypothetical talent system. It’s a lot to ask for from these current devs but the customization options would be immense.
I’ll just say to your proposed talent changes that putting AoE and single target talents on the same row is a bad idea, same as putting mobility and sustain/survivability on the same row. AoE should compete with AoE and sustain should compete with sustain.