The Grand Inquisitor and the Knights of Ren

I don't know what's going on here with the Inquisitors. It seems like every one of them are pretty easy to defeat. Even if they do come back from death with no explanation, they still don't seem that threatening to me. At least we haven't seen them flying around using those dual sabers as helicopters like they were in Rebels. I hope this guy or girl is able to elevate the Inquisitors in some sort of threat that we can take seriously.