Turret buff idea

Now, turrets have been needing changes for awhile, and heres an idea. I love the fact that turret will aggro the first person who attacks someone under their turret, allowing squishy champs able to dive. but that makes things unfun for the person being towerdove, hell, as braum it takes 2-3 people to kill me under turret, and only one takes turret damage, and have the damage dealers get out without a scratch. So, heres my proposition: whoever attacks first will receive the main turret aggro, and anyone who damages someone under their turret afterwards shall be shot at by weaker, less damaging lasers(like the old base turrets) Meaning the tanks will still take a majority of the turret damage but at least the squishies won't get out full health. The lasers will only attack you if you do damage to the person under their turret, but healing and shielding allies won't draw aggro. your thoughts? any way to improvise? let me know!