Added the 3 port forwards I needed and no more.
I have 300/300 fiber Internet. My WAN/LAN throughput went from DL/UL 190/120 on v1.5.6 to 120/110 on 1.10.0 (measured with dslreports.com and speedtest.net)
I was a little surprised to see such a dip in the DL rate.
On my Archer C7 v2 I get around 560/550 with LEDE 17.01.4 (measured with iperf3) and it runs at 300/300 connected to the fiber modem.
Anyone explain the big difference between the two routers? WDR3600 is a 560MHz MIPS and Archer C7 v2 is 720MHz (only 1.3 times higher clock).
I don't believe the QoS and bwmon is causing this much routing degradation. Has the kernel networking improved that much from CC to current LEDE?
Before anyone asks: I'm not gonna try and install gargoyle on the Archer C7: the family would go bonkers

I've been a happy user of gargoyle since v1.5.6 and BTW, IMHO, the Gargoyle UI is a lot easier and more intuitive than the LEDE/openwrt one. Good work!