Sorry, but you cannot be serious. Middleware problems? Which kind of problems? Maybe Larian should communicate this to the community. A lack of communication is a massive problem and the reason that Larian has such a bad reputation inside the Linux community. Last month Pro-Linux.de, Germans biggest Linux-Portal, wrote about Larian - and this was not an advertising article about the company.
We are talking about a delay for nearly 10 Months. In this time a normal skilled coder is able to rewrite a whole game. Loki and LGP were able to port a whole game to Linux within 2-4 Monaths. And, Larian needs over a year for a port of the own game? Sorry, this can be just a joke... or Larian is not working on a port of this game. This is probably the reason that the game is still not available for Linux.