Is there some chance this TPROXY can get in the main code?
Having a transparent proxy makes it so much more powerful...
I'm sure it can be made it's not getting in the way of those using a classic
proxy.

I'm running pound on my router which is also the gateway of my network and
having a transparent proxy means I do not have to change the logging of my
webserver.
Even if you changed the logging.. it still isn't the same as all the backends
need to be made aware they are in fact listening to a proxy and not to the real
client....