I think of myself primarily as a movie buff and only secondarily as a steelbook collector. So I welcome these catalogue releases as a means of upgrading the standard edition Blu-ray and DVD copies of my favourite movies to my preferred type of casing, ie steelbook. In fact, I look forward to more!
However, I'm not averse to modern movies and if something isn't available in the UK then it's probably available somewhere else. You just need to surf the net. Of the titles you have mentioned, I have ordered steelbook editions of "Noah" (3D) and "Edge of Tomorrow" (3D) from amazon.de, and "Pompeii" (3D) from amazon.it. Neither "47 Ronin" nor "I Frankenstein" appeal to me but if they did, I'd be able to obtain a 3D steelbook of the former from Germany and the latter from either Germany, France or Italy. Amazon's European sites offer flat rate shipping of about Eur 4 to the UK, irrespective of the quantity ordered, so it's hardly going to break the bank.
As regards "The Amazing Spider-Man 2", I accept that if you want a 3D steelbook then you're going to have to look further afield, probably to the Far East, since all the European steelbooks announced so far are 2D only. That decision, however, appears to have been made by Sony and not by the companies handling the respective releases: HMV (UK), Amazon (Germany) and FNAC (France).
At the end of the day, I welcome the diversity that collecting steelbooks from all parts of the world offers. If my collection consisted solely of UK editions, I would find it rather bland in comparison.