Oh it's really cute - I like that Mango jacket! I don't like big sleeves, but silly to make them too narrow. Zara did that with one of their jackets last season. My arms aren't big, but the sleeves felt tight. I don't think pure woven cotton will give, unfort. Maybe if it was jersey / knitted, but it's not, is it? Any elastane in the fabric? If not, I think that's just how it is. Worth sizing up?
Re faux suede, I have some shoes in that, and find it preferable to vinyl/plastic (I never go there), but it's not ideal and it's not v durable. It's almost disposable fashion. Which sometimes has it's place (I mean, who can afford to only but top quality everything), but I try and avoid doing that. [ponce emoticon]