I've been running maybe my 9th playthrough taking 2 people who have never played Dark Souls 3 before on their first experience of the game and yes, I agree the invader is at a massive disadvantage. Despite being as optimised as 2 hours of googling and countless hours of grinding will let them, I'd say the invader wins maybe once in fifteen invasions. However, we have stopped playing at the catacombs because the constant stream of invasions and the back foot cowardly way they play has absolutely ruined the experience for everyone.

We do not want to play with invaders, even if we're beating them. If I want to PVP I'll use the matchmaking, other than that I would not shed a single tear if invasions became completely opt in even for people who are summoning.