Air Quotes wrote...
It's still top tier, but I think it should be distinguished more.
I don't really know how top tier it is.
Some people made claims about how it is so great you can one-shot three targets rapidly, but ignore the fact you don't need both hands to count what a max weapon damage GI w/ Cloak can one-shot with the Valiant X and Phasic III + max amps / gear. Namely on Gold: Cerburus Assault Trooper, Guardian, Cannibal, Husk, Geth Trooper, Collector Trooper and both Abominations. Add in Dragoon if you use Targetting VI III instead of Rail Amp. On Platinum you can forget the Dragoon. Compare to Black Widow which with the same setup will actually one-shot every single Cerberus unit on Gold save the Turret and Atlas.
The sustained DPS argument is usually thrown about, but the problem is that the Valiant isn't terribly ammo efficient and after you kill a boss or two have fun getting more ammo. Admittedly this issue is really only present on Platinum.
Also related to the above is that the sustained DPS of the Val requires near constant LOS to the enemy which is a nice recipe for absorbing some return fire. It also means that on an infiltrator you are wasting shots out of cloak bonus and practically speaking your DPS advantage over something like a Black Widow isn't as large as it appears on paper.
It is definitely better than most of the sniper rifles outside Black Widow, Javelin and maybe Widow though. I don't think this is particularly high praise.