So... you haven't even bothered to read the skills. Sge skills are almost identical to Sch and if someone reads them for more than 5m can see the smilarities, here are a few:
-Dosis with broil, Eukrasian Dosis with Biolysis (wich is only pressing Eukrasia before Dosis, Eukrasia being a buff that only affects 3 skills, saying its complicated is laughable) Dykrasia with art of war, this about dps
-Kardia is Embrace, Physis is whispering dawn, Holos is fey blessing and you could even treat Soteria as a flavour of Fey union, Panhaima is a flavour of Consolation, this about fairy skills
-Kerachole is Sacred Soil, Druochole is Lustrate, Ixochole is Indom and Taurochole is Excog and Rizomata is Recitation, this about Addersgall/Aetherflow which is only different in the way that is generated automatically.
-Diagnosis is Physick, Eukrasian Diagnosis is Adlo, Eukrasian Prognosis is Succor and Pepsis is Emergency Tactics, this about the gcd heals
To say as someone whose main class is Sch lv80 that Sge looks complicated when its Sch 2.0 tells me that either you're trolling and have not dedicated even the slightest thought and effort to read Sge's tooltips
I wonder why is that dps is that common, maybe is because their jobs are better designed? Also, how is that tanks are not oversimplified to 1 button spam when their role is also in high demand? or better, How is that back in HW and SB when healers had more tools there was no shortage of healers? Someone could say that good design and fun mechanics is what attracts players that put time and effort into the job and not how oversimplified a class is or how much does it cuddle the newbies/players who dont want to learn.