It’s not that extreme at all, however there is a large indian and south asian population, it is noticeable. That being said there are still people from many other countries and it is diverse, nowhere near an indian college. It will feel like a proper uni abroad don’t worry.
If you were looking for a place that’s more ‘diverse’ and had not so many people from the same country as you, then yes a lot of other uni’s such as birmingham are closer to the experience you’re looking for.
I’m south asian myself, so I know what you mean by wanting a more diverse experience.
In short, there’s a big south asian population, but it’s more than diverse enough.
I’m heading into comp sci this year too at aston, let me know if you want to stay in touch through socials!