With the Slate, don’t expect faster wi-fi when you are out… you are still facing the speed of whatever access point you are bridged to. The two main uses (that I’ve found) are:
Provide multiple devices access to a “single device” access point (like at a hotel that charges you for each device connected to their network).
Create a VPN to either a commercial VPN service or your home router in order to increase security while in public.
I used to travel to China frequently and would connect to my home VPN from the hotel in Shanghai. I’d have a Amazon Firestick with me and using my Slate could watch Netflix while behind the Great Firewall of China.
As for Asuswrt-Merlin, yes, it’s a free download. While it’s not an offical Asus product, it’s been “blessed” by Asus and the developer often works with Asus on bug fixes and enhancements. The latest version of the firmware can be found in the first post of this thread:
It’s OpenVPN implementation works great with the Slate and once it’s set up, I’ve found it nearly seamless. As I said, I primarily use Wireguard now but I do keep an OpenVPN server online as backup.
For your connection issues, I’m not sure what is going on there. I don’t really understand the setup. It almost sounds like you have two routers with conflicting settings…
Let me know if you have more questions! If you have more specific AC68U questions feel free to look me up at SmallNetBuilder. I’m Lost Dog on there as well. There are a handful of people over there with gl-inet equipment with similar setups!
I know that gl-inet has some home routers as well and I don’t mean to take away from their success! I just don’t have any experience with them. For the travel routers, I’m a HUGE fan!!!