You need to do at least 10 fights per week or you drop ranks. So you absolutely get people like me who are too lazy to bother, and hover around silver 3/4.

I go between s2-s4 myself nowdays. After getting rammantu I see no point in 3v3. On the plus side I leave free wins out until friday night.

I like the gold bazaar rewards.  Also better CvC points but I get that doesn't appeal to everyone.

Same.  I like my monthly sacred shard and lego book, plus I grind over 75k CVC points out of 3v3 every time.   

I have seen you comment previously about not engaging with 3v3 Arena, but you don't even do your 5/day?  Meaning that you give up the energy refill for completing the Advanced Quests?  If you don't care about falling in Tiers, why wouldn't you at least do 5 auto-battle losses to finish the quest and claim your energy?    

@Keddy:  If you post your Toon Roster, we can help you with team composition.   

I've long since given up on doing daily/advanced quests. At this point the only things I do are fusions, Hydra, DT, and Sintranos, and the occasional thing like the current Rathalos soul thing.