I used throw for many months in PvP I've beaten basically every meta team out there with it, granted stand alone throwers are bad, a team built around it can he devastating.
While not bad... it is in about the same boat as confident strike on PvE though right This said it seems mortar and throw are tied together and will only improve in the future so who knows what it actually needs for now as it seems to be coming along nicely.
Throw = mediocre damage tons of support
Mortar = tons of damage need of support
Catapults and rocket launchers oh my.
There are obvious exceptions to this, but on average this is what I usually see them as.
as for confident strike, I've built a team around jingle and he's swept entire teams for me on many occasions aswell