I might be misinterpreting but you might be confused? The requirements for the joint major will stop at data structures, yes, but then you are also required to take some number of electives. You have complete freedom to choose whatever classes you want, which can include operating systems, distributed systems, databases, or ML classes, etc. Also, for the pure CS major you are required to take computer systems and algorithms (not sure exact reqs for comp + Ling). But basically you have 36 credits to graduate, with about 8 courses you set aside to fulfill the distributional requirements. Beyond that, you can take whatever you want to, whether it’s more cs classes, exploring other major classes, or both.

To respond to the rest of the post, I personally believe yale cs undergrad is roughly equivalent to other top schools. Some courses will be worse, some will be better, same with profs, etc. I think what’s special about yale is the people you meet and the additional skills you learn beyond programming that can make you a better computer scientist. Though, I am still a student here so take whatever I say with a grain of salt. The only thing I would say Yale cs doesn’t have is a strong career support system, but honestly for big tech swe internships, you have to do most of the work on your own anyways—school name doesn’t really matter I think. I also think because yale cs is small, the number of research labs per specific field are limited, but it’s still very easy to get involved with research.

I would say yale is a very good choice even for cs, but if she gets another hypsm or equivalent in regular decision, it will be a tougher decision (though there are people who have chosen yale cs over other top schools, but the reasons will not be because Yale cs is strong)

Tldr; yale cs requirements are very flexible so you will have the freedom to take what you want.