What would you add to a crocodile?

They are missing manners. It’s poor form to eat people.

Either some sort of crest or a neck frill.

Octopus style optical camouflage, the ability to accurately mimic the cries of human children, wings, definitely, a row of spines on the back, with the ability shoot poisonous spikes at prey over long ranges at supersonic velocities, poisonous and acidic spit is a nifty thing to have, too.
Oh, and laserbeams.

And manners @ragingloli.

You are right.
They definitely need the ability to eat with fork and knife.

Add wings, flaming breath, manners and intelligence, and you’ve got a dragon, more or less.

As a one-shot improvement in their hunting outcomes, they could develop a breath or symbiotic fungus or something that creates an odorless gas that induces stupor in prey animals.

Better eye lids.

Longer arms, so they can pull you into their big mouths. Although I do like @SavoirFaire‘s neck frill, too.

Gee, I’ve heard that everything is better with Bluetooth.

Invisability

Gatling Gun

A zipper and a handle.

A scorpion stinger would be neat, sting multiple times and paralyze their prey. Could be a fun horror movie, I’d watch that.

Wings.

And an iridescent hide.

The self-esteem to not descend into maelstroms of self-doubt, when humans imply that their tears are insincere. ;-)
I mean, c’mon peepul- when you lose your mate AND one of your legs, it’s cryin’ time!

I would give him a massive drug team and call him “El chompo”

I vote to make them easier to spot and run from by giving them a hot pink mohawk the length of their bodies.

Opposable thumbs and the ability to use tools.
More complex vocal cords so they can communicate with other crocs to better plan and coordinate their attacks.

Furry with cuter faces so people coo at them and try to entice them over to pet.

A good anti blemish skincare product with revitalising moisturiser.

@Kropotkin Nice!! I’d totally pet a croc-o-pup.

How about adding an alligator??!

Maybe venom glands.
Similar to the Arizona gila monster.

Breathing fire would be cool.
Well, for them…

Add a death gaze if you want a basilisk .

The ability to snuff covid.

The regular stuff: salt, pepper, garlic, basil, olive oil