Feature:
What the title says, these things are very unsightly and I don't like having them clog up the rivers and lakes in deserts, badlands, savannas, etc., it makes navigating through them via boat much less enjoyable. It would be nice to have something under the config options to remove these from the worldgen.

Alternatives:

As far as I am aware, there is no other really practical way to do this other than a built in config option.

Additional info:
Image of the clay blobs in question;

I was just looking for the same thing.
I thought it may have been an interaction with Cascades (Hybrid Beta), but maybe not.

It might be controllable with a datapack, since it seems to be defined via data.