Mailchimp Block: Consent text and customize option

[iamtakashi]

It's pretty common to have a subscription form in a confined space like a footer, for example:

As you can see above, the lengthy consent text from the block makes it look tall and unpleasant. I had a look at the Mailchimp's support page where we can see examples of their embed forms, and I didn't see the consent text around the form as default. That makes me wonder if we can remove it so that it could be more compact.

If we really have to have it then, can we shorten it? Can we provide a font size option for the text? Or can we change it to a notice that only appears in a confirmation step? I almost think an extra step would be better than the current state :)

Also, it'd be good to provide customize options just like the subscription block as well.

Lastly, the message that appears after adding an email doesn't look good either. We should remove the background on the text.

cc @apeatling @ianstewart @alaczek

[iamtakashi]

I've tested with Twenty Twenty-Two, but it looks even worse than the screenshot above.

• There is no customisation for the input field, the button, and the consent text size or colour.
• Outline button doesn't work as expected.

[iamtakashi]

I'm revisiting this issue because I often find myself adjusting the style with CSS.

Can we have a font size option for the consent text? And can we make it customisable from Global Styles so that we don't need to style it in a CSS?

cc: @jeffikus