It would help if you pointed out when these changes happen and who is making them. I very rarely see any admin change the map for any reason, and while plenty of players clamor for Arena I've only witnessed someone actually change it to Arena twice in the last two months.
I'm locking the topic until Pappy chooses to post again. Threads posted here are not peanut galleries, don't comment in them unless you are: a witness, the plaintiff, or the defendant.
I've seen plenty of rounds that come down to 10+ vs 1 where 6+ of those 10+ TK/TW each other to the point where that last man standing on the opposing team simply one-shots the remaining players and wins the round. Your "having fun" with your friends shouldn't result in the other 20/30/50+ people on your team losing the round because you decided to play grab-ass when you thought victory was in the bag.
It's an especially bad idea against a HX who could avoid damage while you teamkill your friends and then blow you a way in one or two shots for an easy win.
Yeah that first video looks like a ROTK re-skinned Warband, even down to the reticules used for ranged weapons to the maps. Although knowing how Chinese games go this one will (hopefully) play like utter crap, something that a ripoff like this deserves.