Rek'Sai 's new ult tunnels should stay

Rek'Sai new ultimate allows her to be like a Nocturne's ult basically but have to deal damage to her targets first in prior before dashing to them. In visual she already creates this tunnel when using her new ult but the tunnels just breaks right away. So my take on would be that wouldn't it be awesome if her new ultimate creates the tunnels that she dives into then out onto her preys but let the tunnels that were created from her ultimate to stay on the rift for a set duration so she can go back into the tunnels when she finishes killing her prey. Since her new ultimate deals missing health % damage so it's an execution and allowing her to go back into the tunnels created via her new ultimate can give a better feel I think, like an escape or similar to how Zed's ultimate is like, creating another shadow that allows him to make more usage for it. Just that in Rek'sai case, she would have to manually still go click/walk to the tunnel instead of just pressing a single key like how Zed's ult shadow would be. So even if the enemy somehow flashes or dashes away as you are ult'ing them, Rek'Sai won't be in this awkward position and can just go back into the tunnel, back to safety. Much like how Sharks that would miss biting their preys and would simply just dive back into the sea.