I totally get that. For most people, watch history and relevant recommendations are indeed useful tools.
But if, for some reasons, you want to switch off these tools, the price to pay was a home page full of flashy clickbait miniatures. This terrible home page could have been an incentive to switch history on.
Now, it's just a minimalistic google-ish search page. It's an unexpected improvement when they could have done much worse, like a home page autoplaying ad videos, for example.