[boost] [Containers] How about a list with O(1) splice?

In another thread, Stephan T. Lavavej wrote:

Two-list partial-splice is now linear time. FDIS 23.3.5.5 [list.ops]/14: "Complexity: Constant time if &x == this; otherwise, linear time."

Is there an opportunity here for Boost.Containers to provide a std::list replacement that keeps the old O(1) splice and O(N) size? I can imagine a lot of demand for this once people discover that their old splicing code is trashed by a std library upgrade... [OT: does anyone know of a list of "C++1x nasties" like this? It's easy to find lists of new features, but harder to find lists of misfeatures...] Regards, Phil.