Does alien tech scale with time in XCOM: Enemy Unknown?
If I forgo completing the Alien Base Assault mission for a few game months, will the aliens advance as well, making the mission harder?
I realize incidental missions get more difficult and scale, but does a story mission, like the Alien Base, change the longer I put it off?
Yes, it will get harder. I waited a few months on my first play through and was fighting cyberdiscs, cryssalids, and a few mutons.
On my second play through I went right away for the panic reduction and 2-3 cryssalids were the highest level enemy I fought.
Strategically if you can wait and use the assault to reduce panic when you need it, that would be useful.