while the canon in arurf seems like a good idea, it really isnt.
any non hypermobile champs that doesnt have strong cc (for example ashe) is just an even bigger victim to stuff like ekko pyke kha zed riven darius etc etc etc etc. idk i think the canon should be seen as a teleport spell, with a (lower) cooldown just like TP had.
also there is a major difference i have to mention. nexus blitz canon made you untargetable during mid-fly. arurf canon doesnt. which brings several problems with it. thresh hooking you out of it if youre unlucky. poppy e. yi q. etc etc