So after playing Rek Sai.
I have been playing her awhile. And I notice a few major problems with her that are really hurting her.
Her burrowing is more of a hindrance than a buff. I can't see people unless they stand directly on top of me and if they stand still or you abilities for movement you can't see them.
Her Q is nice and all in burrowed but you have 0 chase other than opening up tunnels.
She has no innate tankiness for engaging what she is supposed to be doing. Her base damages also seem to be very bad considering how poorly she scales.
Her tunnels give gold for doing nothing but standing on them and denying her movement and ult. Why do you need gold for that? It's like stepping on Zyra seeds and getting 5g. 5g doesn't seem like much but it really adds up.
She needs some more chasing and a little bit of tankiness and less incentive to counter play her ult because it is so situational to begin with. It would be nice to get like an extra 50-100% minimum view range in burrowed form, considering you have 0 clue who you are chasing unless you have vision from other sources.