Ok time to fix things here ;
(All strategies are made for melee enemy champs cuz %80 of meta toplaners are melee anyways)
-Her q is not for hitting people in lane, its for clearing minion waves
If you want to hit q , first use your e on enemy champ and start harrasing it with clone,if your opponent turns back to you and fight , jump on their face with w and then q.If they run away just hit the clone and get free harras.
-If you give her w more range she will just jump on people and destroy them since she has
%120-%160 ad ratio on tentacles
%10-%40 on q
%8 max hp for every 100 ad on e
%50 on ulti
this means her combo deals massive damage so there has to be a drawback , and it is lack of gap closer.You must use this ability to protect your tentacles since most of the opponents you will face in lane are melee and when they got close to a tentacle to destroy it, you must get close to them and if they dont go back just jump on them to deal huge damage with tentacle.
-Her e is one of the safest way to deal damage in the game and even if you dont get to deal damage with clone and they run it will spawn tentacles and screw with their laning so no , an ability that has so much effect on laning must be hard to pull off (+projectile speed is quite fast so its not that hard to use at all).
-Lets assume that its level 6 and you have a tentacle near your opponent u can pull a combo like e r w q + hit from 2 tentacles
this will deal damage around 600-1000 depending on your opponent armor and your ad so its usefull for 1-1 too.
Hope this helps i answered all your points,have a nice day.