If you ask to trade up to the "newest" EP5 I think you'll be pleasantly surprised. They seem to be using right and day clearer glass in their newest EP5's compared to the older ones with sub par below average glass. I recently bought 2 of their newest EP5s recently last month and they're hands down night and day superior compared to all of my friends' older EP5s specifically in the glass department. I'd rate it very close to the Athlon Cronus and on par with the Tract Toric ELR and comparable glass with the Filipino Burris XTR3i 5.5-30x56 with far less noticeable chromatic aberration. I prefer looking through the EP5 to these other scopes due to the huge eyebox and extra wide sight picture.
I have a Vortex Razor Gen 3 also and it's better than the newest Arken EP5 it's not even close and rightfully so due to the major price difference.