I think removing Projectile Rifle [PR] is totally a bad idea. The current Hero class has both "hero" and "mercenary" characters. Merceneries dont dodging and dashing... they have the skills and the weapons to do their job. The heroes dont sniping, they get (or steal) the weapons and they have the luck to win. That luck was the old Dodge. The old Dodge without PR (Hero) and Reinforcements (ET) wasnt OP. The problem was that both PR and reinf was/is a default ability for their classes. If there'd be a "lock-out" (like the M5 attachments have) on PR and old Dodge, these abilities couldnt be used together, so it wouldnt be OP, yet the class could represent both heroes and merceneries. IMO this could be the only solution for the PR problem, because the mod doesnt have enough characters to seperate this class (and their abilities) to 2; and PR couldnt be simply replaced with another weapon, so the class'd be boring. Dash should be also on this lockout, and a "new" weapon, the Heavy Imperial Repeater from the base game should be added, what also should be on this lockout, so it'd be (Dodge and Dash) OR (Repeater and PR); aka Hero OR Mercenary choice. Heal should be replaced with Bacta packs, because the current healing is just unfair (on 62HP, lvl2 heals more than lvl3, what is nonsense). I think this could be a fair change for the class, and you shouldnt nerf it to the ground by removing one of the 2 weapons of this class (I count Pistol and Blaster to 1, because they're never used together). I'm not a dev, however this is my opinion about this class.
Anyway, back to the Dash problem, you should add the same CD to Dash what Dexterity has. Dexterity has like ~3,5s CD on rolling, while Dash has dunno... ~1,5s? It'd be fair for everyone. With the same logic, this CD should be applied to all Force powers, preventing "popular" situations like Push spam. I think it'd be fair for everyone, because a misused Push, Pull or even Dash would have much more impact. Now its like "I missed? Doesnt matter, I still have FP/Stamina for 3 more Push/Dash".