I wouldn't bother with a second
http://www.wowhead.com/item=115349/talon-of-vultros. For bg's, you want a slower dagger like
http://www.wowhead.com/item=133693/jagged-wing-slasher in your main hand and then a higher level dagger in your off hand for ilvl increase.
If you haven't played since Legion then yes, it's all about ilvl inside the bg. Even getting white rings and neck to increase ilvl such as
http://www.wowhead.com/item=7337/the-rock helps lift ilvl. I'm assuming your a sub'd Vet so you will have access to these higher ilvl white items. Some other slots you can get blue items from bg crates which are ilvl 28 so they are better inside the bg and rogues also have access to a high level Draenor masks such as
http://www.wowhead.com/item=120435/mossy-green-mask.
I've got a F2P Assis Rogue but they aren't in a good place atm in PvP. In world PvP with double Ele Force you'll whoop some, but inside the bg with the bleeds and poison it's not enough to be a serious threat to anyone. You'll be more a supportive role. Outlaw on the other hand seems to be quite a nuisance Rogue spec in PvP atm.
So in summary, I wouldn't bother with the second
http://www.wowhead.com/item=115349/talon-of-vultros.