I really do agree with you, sneak is currently in such an underpowered position it's not a viable thing to use, it is effectively wasting your AP. I am all for changing it to 2 AP, and if that's too powerful then I'd be fine with that, I'd rather have it be too powerful than a token inclusion.
I feel your pain too, rogue is my archetype of choice and them being simply more dots\burst focused warriors in this game isn't quite my bag. But they might be if I could do some in-combat backstabs ala the sneak attack of dnd5e.
On a side note what's the deal with dual wielding rogues being all the vogue this decade? Back in MY DAY rogues used ONE short sword and we LIKED IT THAT WAY. Now we got all these new-fangled dual wielding hipsters and I am not okay with that.
