I'd like to share my thoughts about Vengeance tacticals and set bonuses from PVE point of view.
<Vengeance>
Bloody Vengeance tactical without any cooldown, might result in Vengeful Slam coming off cooldown in 2 GCDs. I think that change is going to be overpowered, so my suggestion is to make an effect occur every 3 seconds.
Payback might make it interesting for PVP, although I don't see it being useful for PVE, unless player is currently offtanking the boss/add.
As for Crimson Slash I'm definetely into it, because player will have to keep an eye on bleeds, what's gonna make gameplay more interesting.
<Juggernaut>
Higher Focus Makes Enrage even more of a offensive cooldown, good one.
Keep Away Useful in PVP.
Grit Teeth If Endure Pain lasts 10 seconds, we can ideally have Enraged Defense coming off cooldown every 40-50 seconds. I think it's a bit too much, so my suggestion is to reduce cooldown per hit by 6 instead of 10 seconds.
Interceding Defense Makes intercede even more useful, good change.
Speaking of set bonuses:
Retaliator - Useful in PVP, since in PVE there aren't many opportunities to use Retaliation as a Juggernaut DPS.
Strengthening Scream - Very strong deffensive boost, but I'd suggest having damage reduction up to 35%, AoEing a large group of adds might result in having 100% or nearly 100% damage reduction.
Eventually, i think those changes might positively affect Juggernaut Vengeance gameplay, although it will require some practical testing to balance it properly.