It's helpful and I'm glad you took the time to made it, but it just make more clear that it's an inconvenient to some people.
For players in Europe that have a normal life (work or school, a family), arenas are at the following:
1 AM - 3 AM <-(... sleeping, if you have something to do next morning)
5 AM - 7 AM <-(still sleeping or going to work/school)
3 PM - 5 PM on Sat and Sun <-(actually fine, twice a week)
8 PM - 10 PM <-(quite decent, after dinner just before going to bed. Sadly, it's about the time one would like to level/play)
So, it's not like an European player is totally out of arenas, but life requires to lose most of them. If only they could be spreaded a little more or best, prolonged, it would be better.
Alternate Eden Eternal client download: http://www.onrpg.com/MMO/Eden-Eternal