It would breake her earlygame if she got even more dmg pre 6, epecially if the reset mechanic stays,
and i realy like her current E, it's 1 of the only 2 aoe pulls in the game, perfectly for seting up aoe-combos.
Well the goal would be to remove the damage from her dash, but add utility such as a slow. Something to synergize with her passive, and landing Q again.
Her ult would then essentially be a much more powerful version of Moonfall (Current E), with again making sure the effects synergize with her passive and landing Q's. The new Moonfall would essentially be a point blank AOE at Location type of spell. Meaning the steroids etc would only effect Diana in the radius of where she cast her ult, and not just innate stats that follow her around. Think Trundles Frozen Domain (W), except not at a target location, but simply an AOE around Diana herself, that stays put once cast.
This would lower her burst, but give her more potential to survive and sustain damage. You could tweak the numbers of her other abilities at this point as losing all of her ultimate damage could weaken her significantly. Maybe add some damage to moonfall ult, or boost Crecent Strike/Pale Cascade? Not sure but I think the change would certainly give her more room to work with, and help all her abilities better Synergize with each other. Give her a solid place in the jungle, and a less hit or miss mid lane.
I don't like the vision stuff the OP added, I just like the initial idea of switching E and R. Q and Dashing are basically the core gameplay mechanics of her kit, but she's currently in a position where, as is, they either do too much burst, or so little that she's essentially useless. The burst potential of that combo has gotten all of her other abilities nerfed. These changes focus on.. well, changing that, by adjusting her kit without ruining her gameplay, or simply tweaking numbers.