To be fair to the film, if you really had money left for a decent writer, after all that spending on rich underwater filming and star power, you'd have to be, well, Lakshmi Mittal.
Akshay Kumar returns to a genre that he was originally comfortable in, before he became one of Bollywood's "complete entertainers". It is his reported penchant for death-defying stunts - a passion that's seen quite a few outlets, both in cinema and on TV - that drives you to Blue. That is, if the much-publicized cinematography hasn't drawn your attention.