This afternoon, at 17:00 PM UK time, an hour long debate was held in the French Senate concerning the plight of the Accidental Americans as a result of FATCA. The (French) Senate unanimously adopted the motion for a resolution pursuant to Article 34-1 of the Constitution.
The Government of France will now consider the following:
-Their (Accidental Americans) right to the bank account;
-The guarantee of the end of the differences of treatment by the French banks;
-Reciprocity in the implementation of the bilateral FATCA agreement;
-Informing the French living in the United States of the tax consequences attached to their expatriation;
-The implementation of diplomatic action to obtain treatment for "accidental Americans" allowing them either to renounce US citizenship through a simple and free procedure, or to be exempted from US tax obligations;
-Reciprocal application of the Franco-American agreement of 14 November 2013.
Full reciprocity as defined in the IGA is mentioned twice.
http://www.senat.fr/espace_presse/actualites/201805/americains_accidentels_concernes_par_le_fatca.html#c640282(Sorry, it's in French)
Last night, I read the link supplied in the OP regarding the study commissioned by the EU Parliament. In addition to much we already understand, the study included cost estimates for the implementation of FATCA.
KPMG estimate globally the cost was/is US$30 billion. An article in Forbes estimates the cost annually at US$8 billion and US$200 billion total globally.
The study concludes that the EU financial sector represents at least 33% of the global cost, so going by KPMG, US$10 billion total cost to the EU; and by Forbes, US$2.6 annual and a total of US$67 billion cost to the EU. That's a fair amount of money spent in the EU which benefits the US only (US$800 million/year US estimate), and no full reciprocity as agreed in the IGAs. (Page 23 of the OP link.)
Combined with other recent global actions coming from Washington appearing to be less than popular in the EU, it isn't surprising there might be a bit of kick back in Brussels, Paris, London, etc.