Actually. The rules were subject to the people actually participating. A lot of places adopted T1 or a variation of it,because it kept things clean and cut out a lot of "BIG MASSIVE SUPER ATTACK BECAUSE I'M.DYING".

The GT employed it as well. However if say, me and Skallagrim were to have a pick up fight we would simply Starr a thread and go from there. What characters, what levels, what rules. And if there was a problem, we would talk it out, and following that find a third party to make a ruling. 

Also, there are a lot of mature combatants and a lot of immature ones. Th Arena doesn't alienate. I've seen new people come in and stick around, learn T1 and.enjoy it like the rest,  and some come in and complain that they should be allowed to use their ultimate attack with nary a prep or a peep.