Aberants are weird, alien, and strange beings that are usually very intelligent. Unfortunately, many players rarely get to wield such powers. Aberant subclasses such as the Aberant sorcerer or Great Old One patron do allow a player to dip their toe into the world of aberations, but that is the extent of it.
Aberant Mad Scientist gives you a treasure trove of aberant abilities and body parts to evolve, allowing for a unique and fun style of gameplay that would be different every time you play it. You want to skulk like a slaad, okay. Devour like a mindflayer, no problem. Shoot freaking lasers out of your freaking eyes, Aberant Mad Scientist has that too!
With this build, you will certainly be able to seek out that next juicy and intelligent meal that promises more power. Creatures will rarely get the drop on you! Some say you have eyes in the back of your head. Water, not a problem. Bridge collapses under you or a trap collapses under you, no problem. You're an aberation, you're above all those problems. When you can live in space, you have no problem surviving on the ground.
Detect your enemies.
Rise above them, and add their intelligence to your own.
- from the publisher's blurb