Within the next few weeks I should be posting up some material about our Scrin design. I'm not talking about weapon and unit stats (though that will be there as well), I'm referring to a history written out so that anyone who is interested can look at this and not only see WHY the Scrin in our mod work the way they do but also get a glimps of what the Scrin will look like from this point forward.
For example, the upgrade/powers system is going to be changed (again). But this is for the better, trust me. We're working on adding a bit of flavor to the upgrade choices and giving a better reasoning as to why the Scrin have different choices that they can take at the beginning.
We've also been working on NOD, though with NOD it's been more of a fine tuning of their story and restructuring of their forces to fit the story better than the Scrins entire back-history remake.
GDI is staying largely the way it is with only a few weapon tweaks. The major changes to GDI will come in their super-powers. Right now GDI's Ion Cannon while useful isn't excatly what I would call a "game ender". We're looking to moving the MOAB Firehawk Strike to a later superpower and actually make it a superpower due to it's effect in game. We're also looking to add a 3rd "power" to GDI that when used with the other 2 GDI's options for dealing with end game situations will become more adaptable than before.
Finally, again with the Scrin, we know that some people have pushed back a bit about missing weapons that used to be there (spicificly defensive structures). In the next version of the Scrin all of these things will be back, but probably not the way your expecting them. Keep your eyes open, and I'll post more when I get a chance.