Your assuming thats how it works. What if AFK only pertains to tower sitters. Then most of your complaint falls apart. If afk is only those AFK, then your complaint has no bearing. There is no "manipulation", it is just what it is and your being paranoid.
1. lets wait to see what/if Hitech tells us how the "afk" timer is setup.
2. give it some time to play out in the arena. What happens in the mornings eastern times may not be a norm that we can follow.
3. Im thinking this afk thing might be a fix to "prime times" vs ALL the time. Again, time will tell.
Well, you can doubt Kenai if you want, I generally take him at his word. And unironically, you have a post directly below the one I just linked to where you even acknowledge it as being your own suggestion.
https://bbs.hitechcreations.com/smf/index.php/topic,412969.msg5477128.html#msg5477128Eny is less of an issue during primetime because there are simply more players at play. Things can still get done (even with eny/double teaming) 30 v 25 v 37 compared to 17 v 8 v 9 where removing eny makes it more challenging under conditions.
ENY is actually less of an issue than the constant double teaming creating feast/famine fronts that the side switchers and the double teamed-ees complain about, and eny will not resolve this ethos issue - yanno, can't hard code sportsmanship.
For example, right now, look at that base count. Those 4 knits are also pecking at rooks while bish basically go full on vs rooks. Because its weekend, there are a few more players on early. Eny is meaningless here except that it forces bish into lesser rides which isn't really stopping much, just sometimes slows it down a bit until more players log on. Let's not forget GV eny's are kind of... off.
I've stopped upping a plane in these times and just hop from gun to gun getting kills (and denying kills on me) with minimal effort (and I'm getting better in 88's lol.)

Compare this morning screenshot above with one from 10pm cst last night below, same map. What can be inferred when comparing?
Let's see what this morning looks like in about 2 hrs (10:30 cst)