Well one issue - and it isn't discussed nearly enough - is actually the way in which Scottish Labour incorporated a mild version of Scottish Nationalism into its rhetoric and general appeal in the 1980s, turning the issue of social democracy vs. Thatcherism into a question of nation and allowing it to cast itself as a patriotic choice vs. supposedly Whitehall/Westminster controlled Conservatives (a rather
different appeal to back when Willie Ross was dominant internally). Very effective in the short and medium term, but I don't think that the post-2007 and post-2014 errors would have been anywhere near so devastating were that not the background.