I think we all know who the best assassin will be after the Update

more for the mana then anything else, cause I want to have enough mana for more than just one team fight.

if thresh uses his hook to engage and dashes or simply walks into the range of the target then he wont need to use the rfc range

however practically rfc would be superior to shiv as they can't retaliate with the added range of rfc

the damage part is true though

Fighter subclasses (Juggernauts and Divers) were indeed undefined at the time, but that doesn't mean that they couldn't design her as a Diver just because they didn't have the label nailed down yet.

Jumping to the present, here are Riot's definitions of each class

Divers:

Divers are the more mobile portion of the Fighter class. Divers excel at singling out high-priority targets to blitz toward, immediately forcing those targets (and their teammates) to deal with the diver’s presence. Divers are not as durable as the tanks or juggernauts of the world, but Divers can take their fair share of punishment while bringing enough damage to be a real kill threat if left unchecked.

Assassins:

Assassins specialize in infiltrating enemy lines with their unrivaled mobility to quickly dispatch high-priority targets. Due to their mostly melee nature, Assassins must put them themselves into dangerous positions in order to execute their targets. Luckily, they often have** defensive tricks up their sleeves that, if used cleverly, allow them to effectively avoid incoming damage.**

Based on these definitions, Diana seems to fall more into the former than the latter. Her defensive tool in particular, her shield, pushes her towards a Diver's role than an Assassin, simply due to the way it scales in effectiveness. There is an argument to be had for it allowing Diana to "effectively avoid incoming damage", but it's in no way similar to other assassins; Akali's shroud, Fizz's Troll Pole, Kat's Shunpo, Zed's Shadow swapping; all of these tools have a high level of nuance to them, letting you outplay your opponents by avoiding their skills with masterful play, and Diana's shield doesn't really have that. It's ideal use is being activated as you dive your target for guaranteed proccing of the secondary spheres for both the damage, and the increased shield strength.

All this isn't to say that she's not played as an Assassin currently though, or that it's not her most effective play-style. Simply that by examining her abilities and the definitions Riot has provided for their classes, that Diana appears to fall more into the role of Diver than Assassin, even if the terms didn't exists back when she was developed.

The lack of any really impressive skin bothers me as well, though I am rather fond of her base skin anyway.

I'm not saying she is broken, okay? Got that?

Uh, yea? You never really implied that she was broken. Not sure why this is so hostile.

All I am saying she has too much of everything in her kit. Especially tankiness & burst damage.

I'd agree with this, If anything is to be done, I'd imagine that her damage will become less burst oriented and more drawn out, even though that'll tick off people that enjoy playing her as an Assassin.

I think that they may be putting her off until the Diver update, where they can do some systematic changes instead of number just tweaks.