Honest opinion from a 710 059 mastery diana main on her upcoming rework
After testing her on pbe, im kinda worried about these changes, the q r combo defined her identity and she did damage with it, now it just seems like she have no identity anymore.
Now r is replaced by e and really dont do enough damage to even justify the reset on moonlight, it dont even feel like a good idea to max it cause, damage don't scale enough and ratio is too low, also, w has a maximum damage now, it scales with hp, but a tanky diana with no damage don't feels good. Now she rely on a high cooldown r to do damage.
I mean, i actually kinda love this ult cause it do high damage on multiple enemies, altough, the damage is too easy to just be dodged cause it does her old e and after that, enemies have time to escape before the damage land, so i dont imagine it even be good in high elo cause people are too good at dodging, and if they dodge, well 0 damage and over 1 min cooldown, i also noticed that if you die before the damage land, the damage just doesnt apply even if it touch the enemies.
So in a few words q r(e) reset don't do damage, w has a limit on how much it hurt, e has negligible damage and r have high aoe damage, but isnt reliable at all and dont have a strong enough cc to be considered good.
Now i'll compare the abilities:
Q : unchanged but 50 mana instead of 55
W: no clear difference it damage but at level 1 orbs could do 96 but they are restricted at 88, shield at level 1 has 30+30%ap+10% bonus hp when it used to be 40+30% ap, now you need hp to have the same shield amount than before. although mana cost level slower 9 cooldown instead of 10
old: 40 / 55 / 70 / 85 / 100 mana new: 40 / 45 / 50 / 55 / 60 mana
e(I'll compare with old R): 40/60/80/100/120+40% ap E 40/45/50/55/60 mana 22/20/18/16/14 sec cooldown
100/160/220+60% ap R
50/65/80 mana
25/20/15 sec cooldown
R : 100 mana
e effect
slow by 40/50 /60%
200+60%ap +35 +15% ap for each target beyond the first/300+60% ap +60+15% ap/400+60%ap+85+15%ap
100/90/80 sec cooldown
i'll compare this build damage at lvl 18 on both dianas versions with q r(e) w and third auto

new diana: (200+312)+(210+200)+(120+178)+(250+178) = 1648
----yes passive damage is also lowered
if we add a e reset:
1648+(120+178) = 1946
if we add an r on one champion (400+267) = 2315
on a whole team +(85+67)*4 = 2923
old diana: (200+312)+(70+89)*3 + (220+267)+(250+356) = 2082
if we add a r reset = 2569
so the normal combo do 434 more damage on old diana and e reset can't even equalize the normal combo, it do 136 less damage. the old diana r, if resetted, do higher damage than single target new diana r, it do 254 more damage. Altough new diana r do more damage on all the team than the old diana combo with r reset for 354 more damage but still, its highly unlikely to land.
What i would want from this rework is either : -Make e still maxing-worthy and less trash -Make her r more reliable, maybe give it a root instead of a drag and slow, or maybe just make the casting faster or let the damage apply at the same time it apply cc( could use less damage in this case to balance) -Remove maximum damage on W, maybe keep it like it was -Change the whole rework -Don't rework