I noticed the same evolution, aggregators not providing much value other than pricing alerts.
I recently found a site that seems to find you vacation flights the old fashion way, people constantly checking for great discounts out of your preferred airports and when one is found **a human(!?)** emails with details. No push notifications, no fancy email newsletters, no price matrix, just an email with the city, price and a link. Pretty refreshing
The site is called Next Vacay, it recently found me a $258 flight from Los Angeles to Barcelona!
Just pick your home city and see what they have for you: https://nextvacay.com/