skill speed, acc materia

New to 50 pld and so far i have been melding skill speed in alot of slots. Then i start reading and see most people are putting skill speed on the bottom of melding priority. Is there a decent discussion out there about why skill speed is so bad ? Faster abilities + shorter defensive cooldowns seemed awsome. With the dam provoke cd being so long i figured skill speed was great. Also i dont see acc in most stat weight lists. Are we already acc capped at 50...or is it just not worth it...or what ?

Skill speed does not affect any of the longer CD abilities, only the 2.5 second ones. In addition, the rate at which it affects those is so small (10 points per .01 second, iirc) that most consider it completely worthless.