I see where OP is coming from and I agree. To those who say "there's nothing more to simplify", yes there is.
Not only can we merge gemshine/brilliance with ruin iii/tridisaster, but we can also merge energy drain/energy siphon with ruin iv.
Note that energy drain/fester and energy siphon/painflare are literally the same skills but 1 target or 2+ so there's very little point to actually separate them.

SMN is such a shallow job that they have to make up buttons to barely fill up 1 XHB. It's a literal button bloat.