Another problem here is that the big bang is now a paradigm. It is believed to be true—that the universe started that way—so evidence found that contradicts it is woven into the established fabric by use of additional ad hoc hypotheses and new parameters. These result in unknowns that are used to explain the unknown.
Inflation itself is one of these unknowns used to explain the unknowns like the horizon problem, the flatness problem, the monopole problem, etc. So even if you find evidence to support your unknown, what if the unknown is purely fiction? It would not be the first time in science that such a situation has developed. Phlogiston is one such example, which was eventually eliminated.
Hartnett, J. (2014). The Authors of the Claimed Biggest Astrophysics Discovery of the Century Admit They May Have Got It Wrong. Available http://johnhartnett.org/2014/07/03/the-authors-of-the-claimed-biggest-astrophysics-discovery-of-the-century-admit-they-may-have-been-wrong/. Last accessed 17th Jan 2015.