I don't mean this as a knock against Seibs specifically, but while the numbers may suggest our defence has improved, it still doesn't pass the "eye test".
We are not a good defensive team by any measure. If we are the "6th best" defensive team in the NRL, heaven help the 11 teams who are worse than us. Good defensive teams - even average defensive teams - do not give up 30 straight points to the Tigers.
Defence is an afterthought for our players, and has been for years. We never control the ruck, our marker defence is woeful, and our edge defence is questionable on both sides of the field. When momentum turns against us, we start turning our backs, fail to get to the marker position, and panic when attacking players point their fingers at us. If we have defensive "systems" to fall back on, I am yet to see our players put them into action.
Yes, Seibold inherited this, but he's the coach, and it's up to him to fix it.
I have said it elsewhere, but we simply have no desire or ability to defend for more than one set at a time - which is a big problem in the modern NRL where "six agains" come with monotonous regularity. For us to win, we need to hang onto the ball and keep scoring tries. It is our only path to victory. So when that doesn't happen - usually because we turn the ball over, invariably followed by a string of penalties against us - we are done.
It still concerns me that Seibold's emphasis on "using our weapons" (which, as
@LeonardCohen has pointed out elsewhere, is really only one weapon: speed) seemingly comes at the expense of concentrating on our defence. Those weapons are great if you get an opportunity to use them, but it still feels like there is no Plan B in sight.