I'll start by saying that we can never know for sure how much and at what priority level the devs are working on things, especially since they likely have multiple groups working on different things simultaneously. So please keep the /rage in check.
For me personally, I was highly skeptical at hearing of the new Serpent Trial coming in 4.0. I still refuse to be forced to play my v12 sorc and v12 nb with a resto/resto staff and all light armor; unfortunately, you need to do that in order to be successful in trials. I'm sure there's an extremely small subset of players that can meet the dps check requirements without the cookie cutter magicka build, but they need to work 5 times as hard to get half the output. Moreover, the super majority of groups running trials won't take anything other than the cookie cutter build (I won't even participate in my guild groups because I don't want someone to have to 'carry' my stamina build dps). And these groups aren't excluding other builds out of elitism, they do so because they simply can't complete the dps checks otherwise.
The reason why I scowled when I heard there was a new trial is because balance is still in an awful state (though they get props for the set changes included in 3.0 as a great first step). I would rather see significant efforts invested into game balance, or significant efforts invested into revamping the current mechanics of the AA and HRC trials to promote class and build diversity before they spend time on new trials that will just compound the problem.
Moreover, while I'm pretty stoked at the news of spellcrafting, I'm highly worried this will just push the needle even further in the magicka build rules all direction.
What are your thoughts? Should balance improvements come down the pipe before new trials and spellcrafting?