While tool mastery is utterly useless still, the poison is still a bit above mediocre, considering it's free damage for how much PP the trap it gives back. I'd say Grav and Stun grenade (yeah I count them as traps) are actually the big winners, since the range upgrade they get from the lv85 skill is quite significant
Other than that, yeah the 2 new skills are such a great addition for RA !