Originally posted by Hondo:

I will have to disagree, but it really comes down to how you play. I have 2 - 3 "main" bases that I go back to from time to time - just to get away from my current objective to have a little peace. They are pretty far apart and I usually have things I want to do in those areas or do more exploring to expand the map. A lot of people move on once they complete their current objective, but I like to build so I tend to expand my bases or the areas around them. I still get attacked, but I'm able to defend.

But what's the downside to scale up weaker enemies? You will still have to return to old areas to have some fun