This was when I reached the conclusion that if I ever need to run an Exitus Rifle in any of my games, it's going to be significantly buffed to preserve it's status as the best darn sniper rifle in existence.
Not necessarily - the key thing to make the Exitus 'holy bejeezus' is the special ammo types.
A vindicere only gets one of each special round (as per the old version of the tabletop character). The Turbo-penetrator round, however, makes even Stalker special ammunition look like a freakin' potato gun. Artificer plate-ignoring Pen, 4D10 damage before the Accurate bonus, and Felling (whatever I **** well need). It's one of the few weapons shy of lascannons and equivalent which can put a marine flat on his back missing body parts in one hit.
Note that the Exitus standard round already has the dodge penalty - which puts it on a par with a targeter-controlled stalker.