Quote from LiloTheDM >>

I can't believe the creators thought that it would be fit for this animal to be as smart as a raven. Like, ravens have been shown to understand how to work cooperatively, despite being solitary for the most part, they can apparently show a concept of self, which apes can barely pull off, they use tools expertly and often, usually using them as a first option, and they're incredibly adept and intelligent fliers as well. You know what weasels can do? squirm. Bite a bit. Do a little bit of a sniff sniff and then get instantly killed by literally anything that can do even one point of damage. And yes, I am mad over this.

 I feel your anger, dude ... but I think the 2 INT is appropriate for the Weasel; the proper solution is obviously to increase the Raven's INT to at least a 4!

FWIW - I had a Druid in a campaign of mine Wild Shape into one of these to spy on someone in the forest, and I had to go check the +3 Perception and +5 Stealth to make sure he wasn't lying. This little beast is an OP spy!

Ask your DM If you can use an otter for swim speed. They are similar to the weasel. weasels, badgers, otters, ferrets, martens, minks and wolverines are in the same family :)

It should be more charismatic. THEY ARE SO CUTE!! 

Go bug mom, cyrano

Its cool and I am wanting to create one but I agree, if it has swim speed, shouldn't it also have digging, and climbing speed too??

bro why this thing only got 3 CHA? its so cute looking. In my campaign I'm making it so that if it looks at you, you have to make a dc 12 WIS saving throw. #Helptheweasels

That would require someone to research instead of assuming and putting a generic stat block on something. 

That's because the stat block is wrong.  Watch a nature show and see how resilient they are...again using generic stat blocks instead of researching. 

I'm glad to find someone else who's mad at the Beast stat blocks. It was a joke on my part, weasels are among my favorite animals.

You said what I was going to say... Though it would be hard to think otherwise.