I find Fire Punch on Tyranitar to be a bit better. It hits Scizor switchins, Jirachi, Skarmory, Forretress, Breloom (Which resists all 3 of its moves) and plenty more, proving to eb the better choice over Aqua Tail.
Furthermore, Stone Edge is much better than Rock Slide. Using Rock Slide will cause you to miss plenty OHKOs, and the flinch rate is terrible anyways, so you wont be flinching much. Rock Slide is also inaccurate, having 95% of accuracy, so it's not much better in that department either.
On Gallade, I'm going to have to agree, Psycho Cut is much better.
On Rotom, try using Will-o-wisp over Reflect Will-o-wisp is the same thing, but causes HP decrease and lasts linger, as it is infinite until heal Bell/Aromatherapy is used.
As for Heatran and Gliscor, try putting SR on Gliscor and HPGrass in SR's place on Heatran, it will prove to be a far better option.
Bounce on Gyarados could also help, but it really only helps with Celebi.
That's it for my rate, hope I helped.