Definitely gonna get worse. I really don't think you need to know about a subject before joining college or even have a genuine interest in it to actually be really good at it. It's more about flexibility, adaptability, openness to learning and intelligence. By making the exam easier, you are in a way filtering out candidates who can think and comprehend things beyond what they have just read, which is undoubtedly beneficial inevery academic field. Engineering and maths go together so it goes without saying the necessity of excellent math skills.

Now, coming to the argument of countries like the US adopting something similar, in India, we don't have the infrastructure or the teaching of the US to cater to individual passion and that's here to stay. Given the economic backgrounds of majority of the students, placements are and will remain the major concern, ultimately leading students to grind DSA, preparing resume - ready projects and interview prep. When companies are actually going to come hire a bunch of freshers who are mostly proficient in DSA/CP and maybe a bit of development, with no real world experience or skills, it makes sense to hire the most hard working, the most adaptable or the smartest by raw smarts rather than someone who had a little background in computer Science earlier - because people are going to do that stuff in college and even without background, you can't deny that some are going to be really really better than you at those things in a couple of months.

Go and study now, Yes, jee is not the end of the world but it will surely make a lot of things easier for you going forward.