CAA stats for last ten years show Netherlands has not fared well from UK, especially when compared to flows to Middle East and Turkey. Total pax today is not much more than in 2001 for UK - Netherlands.
http://www.caa.co.uk/docs/80/airport..._2001_2011.pdf
There is no doubt that KLM are suffering from EK competition, both in UK and at home. KLM is not alone, but at least they can fight back by serving their hub in Amsterdam from more regional airports in Europe than the Gulf carriers can offer.
3 years ago there was no EK service from AMS to DXB, now its a daily A380 with Etihad shortly starting AMS - AUH.
Ultimately all this competition will be good for UK regional airports and bad for legacy carriers in Europe and Asia.
FF