Food for thought: The GA is not the Republic.
Its mechanics are different. They do not have a Senate. They do not have any PC politicians, military leaders, or Jedi Councilors. It is often argued that PC leadership roles cause drama, which is why the GA has removed that type of role from their faction. However, I would disagree. It is the people who cause drama. There will always be a leader, whether it's made official or not. Someone will be popular, or just arbitrarily considered 'better' than others. That is how people and organizations work. It's unavoidable, and I personally believe having no official political, military, or Jedi leadership solves no problems whatsoever.
Its Jedi Order is different--one that apparently has acquired stolen holocrons belonging to the Republic Jedi Order yet has not given them back. For those of you wanting to play the more 'canon' Jedi types, the Republic is still the place to go.
Merging with the GA will only eliminate the option of a classic 'Old Republic' feel we've been trying to RP. The GA is militant and controversial. The SSC is pacifist and also controversial. It is the members' prerogative to decide what works best for them.
The Republic normally provides a more democratic-yet-firm nation that stands for peace but is not afraid to bare fangs when cornered. Sadly, we have been cornered for far too long and the lines seem to have been drawn and our writers written off each time, and we are beginning to see very turbulent times ahead ICly and also OOCly as we are repeatedly the object of ridicule and scorn.
As for me, I am a staunch Republic person and will wade through until my character's demise.