Well, the move isn't entirely unexpected. For more than a month we've been hearing on the grapevine that Samsung would be significantly delaying (or outright canceling) the Note 5 in Europe. The reason, according to people in the know, is that Samsung's market research showed European Note owners weren't purchasing their phones for the pen input, but instead for the large display and multitasking features.
In essence, the Note line in Europe had suffered a death by focus group.
Samsung's official statement on the matter doesn't give too much away, but does hint at the idea of Europeans not being too keen on the S Pen. (Emphasis ours)
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"With the launch of the original Galaxy Note series in 2011, we created a whole new smart device category that set a new industry standard, which all others have followed. For our European customers, Samsung's portfolio will be centred on the Galaxy S6 edge+, so as to better cater to their needs."[\quote]
http://www.androidcentral.com/galaxy-note-5-europe-and-why-we-cant-have-nice-things