Syndra Max Rank Q Passive Idea (A bit late)

So I was thinking what if the Q max rank passive was this:

Dark Spheres explode at the end of their lifespan (which is 6 seconds) dealing the same damage to champions.

I feel like this passive makes her Q feel like its actually been upgraded into something new (Which was the origional goal when updating syndra's passive) but also it adds some power that isnt upfront loaded into her burst since its delayed by 6 seconds. Instead this gives her access to more control but without sacrificing the damage potential that could be there if people disrespect the control of where her spheres are placed. The only controlled new burst people could use would be placing a Dark Sphere and waiting until about the 5 second mark to E it at an opponent which would burst for the E damage plus the sphere exploding. <but i see this as a skill check as it would require set up and timing. All in all this would be a GREAT more interesting passive for her main damaging spell that accents her Damage and Control themes without sacrificing too much of either but also with plenty of counterplay.