Neither complexity nor simplification are inhetently good or bad imo, it depends what they do with it.
I strongly dislike the notion of having 10 buttons that serve the function of "deal x amount of damage instantly" for instance, with the only difference being various cooldowns or them being procs or oGCDs.
Sure, it's complicated to juggle 40 buttons that all do similar things, but is it any fun at all?
Conversely, if you dumb it down too much, you end up with abysmal snorefests like the current healer "rotation".
That being said, I'm actually enjoying SCH the most atm. I can make some decisions with it that yield really satisfying results.
A nicely timed spreadlo combined with sacred soil and seraph feels really good to pull off when the massive, apocalyptic raid wide deals 0 damage!
It feels good to activate Expedient during mechanics that require lots of speedy movement! I chose to do that, and I'm helping!
Likewise, it's fun to help fellow tanks or even struggling non-tanks as a GNB, tossing them a HoT or using Heart of Corundum on them and watching their health spike up. Wohoo! I did that, and I'm a tank! How out of the box! More please!
Currently my favorite job ideas are stuffed into the RDM job, but I still have issues with it. They have an interesting idea going on with the mana building, and I enjoy dual casting. A simple proc that provides options. Do I cast a white or black spell? Or maybe vercure or verraise?
Where I think it falls apart is the part where you're still essentially just waiting for the same 2min window as everyone else every single fight, where you then dump everything. Dump 2x melee combo. Dump your charge-oGCDs. Your gap closers have potency so you dump those in there too.
It's like they have an idea for a really versatile job that can duck and weave in and out of melee, build up different kinds of resources for different purposes, and use their toolkit in creative and clever ways, then halfway in they decided "nah, let's make them a job whose job it is to hit like a wet noodle, build up gauge, then every 2 min they deal lots of damage, that sure sounds exciting"
How cool wouldn't it be if White/Black mana had different properties? What if you could build 100/0 mana, and you'd get 3 different melee phases based on whether you have 100/0, 0/100, or 50/50?
50/50 could be the bog standard melee combo.
100 black mana would give you a melee combo that chains black spells and puts a huge thunder DoT on the target at the end.
100 white mana would give you a combo that chains white spells, then I dunno, something crazy! Maybe you'd trigger a huge raid-wide heal or something.
Or maybe the melee combos would give you a resource at the end, which you could save, then use the resource when you need it:
50/50: Big AoE damage
Black: Big AoE DoT
White: Big AoE heal or shield
Decision making! Options! Woo!