I can understand the want for her to be untouched because any potential changes to help make her more solid may indeed bring her unwanted attention (according to Diana faithfuls, and any other champ mains alike for their respective champs). However it's already been established that in the distant future she will be getting reworked to have a more solid Identity. They DO NOT like her dual role as both an Assassin and Fighter, she will get the Ahri treatment eventually. What do I mean by that? Ahri was fine before the changes were made to bring less attention to her charm and more to her Q and W, thus shifting her to a mage and killing off her Assassin aspect with the added change of removing DFG. Ahri wasnt broken but her identity wasnt clear cut, it was too flexible and not intended in their opinion.
This WILL happen to Diana eventually, whether or not they choose Assassin or Fighter officially is yet to be seen (though even Morello at one point said verbatim that he felt she is more of a fighter). I'm a Diana faithful and I do not fear the eventual changes to come, they will happen whether I like them or not, until then however there is one thing they can do in terms of making her solid in all her visible aspects. That thing is make E less useless, it literately is an underpowered skill for any champion. It's impact is low, even if giving Diana a concrete role isnt the goal at the present moment buffing it's range does not by any means put her over the top.
We dont have to be talking a range increase that put's it in somewhere like the 900 range, I'm not calling for a Mandrop radius sized Moonfall; merely a small hundread or so increase to it's already existing radius. Making a small change like that at the very least makes it so that when I use E on a target that is relatively close to me, they are getting pulled in and cannot simply continue to walk away. Even the scuttle crab can do this, which can be annoying at times and then what when that happens? You have a skill thats unusable for 15 seconds. Unreal, unreasonable, and it can be changed so that you literately aren't wasting mana and an action.