I don't mind it being time consuming, I like that there is a lot to do.
What I'm less keen on is the need for a lot of co-ordination we see in raids. That doesn't really sit well with a mobile game, the appeal of which is surely to be able to pick up in play in bursts whenever and wherever is convenient.
It's a similar story with the arena payout being a ladder with a set cut off time, which really makes playing at that cut off time imperative given the importance of arena rewards. At least with the tournament for example, you can build up your points at a convenient time.
Afterall, if you have the ability always play at set times and coordinate dozens of other players then there are always going to be better ways of doing that playing pc or console MMOs. In a mobile game it somewhat diminishes the appeal, in my opinion anyway.