I strongly disagree. Rek'sai's tunnels give her the capacity to seize domain over an area over time. If she sticks around an area and the enemy team doesn't destroy her tunnels, she can get mobility almost on par with a yasuo in a minion wave. Given a few minutes, you can pretty much seize one half of the enemy jungle and just split push, and unless they send several people after you or a skilled assassin, they will NEVER catch you. Sometimes, not even then.
edit: and the new ultimate also makes rek'sai a WAY scarier duelist as well, with a brief untargetable period, ADDITIONAL gapcloser, and a pretty scary execute, all on a low cooldown (for an ultimate)