I do firmly believe the plateau does have specific value that we do not realise, I have seen too many frustrated posts from individuals to disregard it, all sorts of methods are tried and mostly to no avail, they seem to work a bit but then the body kicks back and packs it on again.
One thing to remember also as has been hinted at, your frustration at not losing any more weight may actually, through a convoluted signaling pathway, be sending stress messages which your body is interpreting as bad times and is holding the weight to ensure it has best chance of survival, so by all means play with a few adjustments, but try to let go of it emotionally if you can.
Ever heard of people trying to have a baby, trying so hard, measuring, timing, doing everything right, too right, all to no avail, then they give up and resign themselves to being childless and within months there's a "bun in the oven", stress can work in very strange ways.
Not sure if it was mentioned earlier, have you tried intermittant fasting(IF)?
IF can often help because it forces the bodies fat burning machinery to fire up every day, so you burn of fat during the fast period, then restock during the feed period, this cycling process seems to help move fat around better. I think we were designed to be hungry regularly and a daily IF will not be enough to put you into starvation response and may help you to shift a little more weight.