The future development depends on two things.
Firstly financial matters, they will not consider upgrading until the retail has been sold off thus getting back the money they will have already laid out.
And the secondly the team/clubs performance, there will have to be the need to increase the capacity so for me it looks like it's be 12k for a very, very long time.
Oh and without sounding like I'm having a whinge, I agree the final design (if this is it) is fairly disappointing without anything being unique about the stadium. Even the main stand roof and floodlights are now looking to be bog standard, when before they had a little something about them.