whether this sentence is ok or not? Could you please correct them, it is urgent. Thank you very much.

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Apr 16, 2012 16:34
Despite the disapproval of the application, if more factors such as culture are integrated into the model, the upgrading theory can eventually be a useful tool to understand Chinese business.


Do 'disapproval' and 'upgrading' these two words not correct?
how about change 'disapproval' to 'disagreement'?
how about change 'the disapproval of the application' to 'the inapplicability of the theory'
And which word is correct in stead of 'upgrading', is 'updating' ok?