As of now, the padded-blocks rule is configured as:

"padded-blocks": [2, "never"],

Since:

"always" requires empty lines at the beginning and ending of block statements (except switch statements and classes)
"never" disallows empty lines at the beginning and ending of block statements

And this implies that in classes and switch statements the never-padded-blocks is not enforced, wouldn't it be coherent to modify the rule as this?

"padded-blocks": [2, { "blocks": "never", "switches": "never", "classes": "never" }],

Here is the reference: http://eslint.org/docs/rules/padded-blocks#classes