Need some items to counter stasis and ground CC.

Notice that I wrote "some items". I don't mean to buff QSS which is OP enough. I mean new items for stasis, ground and possible incoming special CC from new champions. I think it's better to give people to chance to remove them. And the price should be spending a lot of gold to get items that don't suit them much. Imagine the feeling you play Viktor against Malzahar, rushing 1200 Hex Core then 1300 QSS, can't buy anything else during this process. But at least you'll have a chance to fight it back, instead of get CCed and die.

Bard's R (stasis) is too solid for CCing ppl without both dash/blink or flash. It's helpless if your champion can't get untargetable or your thresh is not beside you. It's better to keep Tahm's W alone though. Because Tahm's W is not solid at all.

Cassiopeia's W (ground) is somewhat weird at balance level. In the one hand, if Cass engages, her W is dodgeable because of its cast animation, it's also dodgeable if the defender predicts well.

However, if someone engages Cass's teammate(mostly ADC) and their position is fixed, they must get grounded and get punched, even with full spells and sums. It's unfun to some extent.

For example, Talon must go in front of target if he uses Q. Kat's E goes behind. Zed's R goes behind, Zed can use W earlier though. But some time a good Cass can cover both Zed and his shadow, like a good Lux uses her Q like that. Ekko OP though can go through Cass's W with E's AA.

Just to remind you, to those even stronger engaging champions, like Noc and Yi, relying on AA, Cass's W is nothing. Also, there are other champions having fixed position like Irelia and Jax, but I don't think they need the item to remove ground control.