Price is generally a signal of quality.
It's hard to infer your attitude from two sentences, but I'll go ahead and advise that you change from making suggestions to making recommendations. The difference in connotation is one of leadership. If you are an expert, then be confident. Don't follow the spec, write it yourself.
Also don't limit your suggestions/recommendations to UX. Get involved in the product - it's features, who they're targetting etc.
Development is so commoditised nowadays it would be a shame not to use the opportunity to expand our skillsets.
I don't follow specs to the last misspelled word, and in fact I will provide lots of UX suggestions.