@Nine @Gaypow My 2c:
GS is pretty good at blocking, though Evasion Up is a v.useful skill for GS users, because blocking drains sharpness like no-one's business, so mixing the two up is key.
I'd honestly take FastCharge over Attack+ skills, for similar reasons to doing so w/ the Bow; It means you have more openings for more charged attacks, can land higher-charges more often, and charging is going to be the majority of your actual damage with the GS.
@Gaypow @Nine
GS basically trades complexity-learning for a steeper ramp of learning openings, hitbox ranges & recovery frames;
You get punished harder for whiffs, but once you learn monsters/timing, u'll know when & where to strike, & to what degree.. Which is not-all-but-basically-it in terms of technical complexity (No guages or phials or ammo types or whathaveyou)
Also releasing yr max charge just when it flashes on does more damage than holding it til yr character swings a moment later.