The early war arena is the most fun I have had in AH in years! I flew in there all day yesterday, from 70 people online to when it was full, and never had any problem finding anything from a 1v1 to a massive furball. I haven't that much AH in one day for about 2 years!
One comment though, the map right now is Mindanao, which is eleventy thousand times better for the early war than uterus, which has bases that are just too far apart. The furballs in the middle of Mindanao where the three countries meet are amazing!