"Bland styling" refers to a lack of excitement or uniqueness in the appearance or design of something. It means the style is plain, ordinary, and uninteresting. Full definition
There comes a critical point in a designer's job when, in working to overcome bland styling, he or she must lift the pencil. (automobilemag.com)
«There is an international, bland style of architecture from Stockholm to São Paulo,» he says. (theguardian.com)
That said, upgrading from a 3DS to a 3DS XL would be a step too far, as, bar the screen, it's exactly the same product but bulkier and with blander styling. (t3.com)