I'm going to play the devil's advocate here, but what if you completely removed Tremor Sense? Ignoring everything about Rek'Sai's identity, how would it pan out if while burrowed she just had normal vision? Too much of her power budget is embedded in Tremor Sense and so in pro play she essentially turns into a glorified vision bot. But, by removing this vision crutch, Rek'Sai could possibly become a real champion again outside of pro play.
I'm not saying this is the solution, as Tremor Sense is a thematic that fits extremely well with Rek'Sai's theme; but at the same time it feels useless to play a statistically weak (as in weak stats and skills) champion when many other champions fit the role of a tank/bruiser and have better damage, CC, and mobility because their power budget is not gated by pro play.