fam i play a lot of anivia and i can honestly say that if these changes were made I would call for her to be nerfed... i dont know your circumstances but ill agree with 1 but i dont see how it pulled aggro and i kind of doubt it did. 2- i definitly disagree with this because of the dmg her e will do if she manages to land her q 3- i will agree that she is mana heavy early game but if she is built right she has plenty of mana sustain and can still pump out PLENTY of dmg late game (play safe early) 4-i agree and disagree with this one....you have to realize that if you get caught out that you got caught out and there is very little that is going to save you you have to be able to pull off your risk vs reward here.... if played right you can kill the enemy while you are reviving under your tower...her passive is not a "go all in all the time" sort of thing if anything i use it to trick my opponents to tower dive me while my jg is waiting in the bush (ive killed plenty of yas this way)
i feel like you just had a bad game fam but these changes would make her too op and i cant see it as being viable changes
5 gtfo
honestly there IS on thing i would like to see changes about 
as the person FACING her.
and that is for her wall to INTERRUPT my movement command.. rather than telling it to "find a new path".
this is extremely annoying for those of us at higher ping (like 70 or 80), because the 250 MS its takes for human reaction time mean that is .25 seconds my champion has just autopathed the wrong way, meaning i not only need to get out but i need to spend .25 MORE second just to get myself back to where i was BEFORE the wall hit. THEN run further away. it is nearly a full second of an effective CC when u take into account the higher ping.
her wall needs to flat out override my movement command, not redirect it.
Pretty sure 
has a lower skillshot speed.
Doesn't tower aggro apply when affecting an enemy champion at all? Pretty sure that affecting an enemy champion (displacement, CC, etc.) will aggro tower regardless of the damage dealt.
Anivia has ridiculously safe poke, a hell of a nuke, an amazing zoning tool, and an AoE aura making it easy to farm. She does NOT need buffs IMO.
the OP is right especially since the last patches. Basically any weak early champ is useless (not only Anivia, but she's especially impacted since she has one of the worst pressure early). Games are won or lost in 15 mins. "hey i'm anivia i just got my ROA and... oh ok enemies are already under T3"
another problem is that skillshot champs are getting weaker and weaker as new champs are released, because new champs usually have good kits for dodging. I play since S3 and i noticed this change over the years. Landing a correct skillshot is so hard nowadays and so easily punished, it's ridiculous and makes the game very frustrating (especially with Anivia, having to deal with this terrible slow Q that needs to be double proc'd for any real damage - making it even harder to use efficiently)
