Thanks for your well articulated and researched post. It would be helpful if you could provide us the primary source for your statements on efficacy; its not that I don't trust your word, but I like to read it straight from the original source.
I am curious which metals you are concerned about and why you suspect that despite of their presence, the fact they are highly neurotoxic, and the vast number of immunizations given, safety studies demonstrate no evidence of this?
Efficacy: Belongia, E. A., Simpson, M. D., King, J. P., Sundaram, M. E., Kelley, N. S., Osterholm, M. T., & McLean, H. Q. (2016). Variable influenza vaccine effectiveness by subtype: a systematic review and meta-analysis of test-negative design studies. The Lancet Infectious Diseases, 16(8), 942-951.
Safety: Vellozzi, C., Burwen, D. R., Dobardzic, A., Ball, R., Walton, K., & Haber, P. (2009). Safety of trivalent inactivated influenza vaccines in adults: background for pandemic influenza vaccine safety monitoring. Vaccine, 27(15), 2114-2120.