My experience with Ting was that the connection was pretty much rock solid from the start, so it makes me wonder what's going on in your area. Hope Ting gets that resolved soon.
I'm going to take a look at the Firewalla as I rather have an Ethernet only router than I can stick by the fiber connection and make the Asus router a wireless access point.
So the Firewalla arrived early (on Saturday) and I've set it up. It's pretty impressive. Tons of network details (throughput, blocked incoming connection logs, upload and download volumes, most hit URLs/IP addresses, per-device, per-domain and per-network usage alerts, and more, customizable routing on per-device or per-domain through one WAN or the other and other related features).
The Firewalla was able to clone the MAC address of my old router, so I was able to just plug it in and Ting's ONT happily provided a network connection. I've also got my old Comcast Xfinity network connection attached as WAN #2 for failover (which I'm going to downgrade to a slower, cheaper plan just for backup). It failed over for about 5 minutes on Sunday and worked pretty well. The Firewalla will periodically ping certain DNS servers, and if there's no response, it'll fail the WAN connection and switch to WAN #2, then will monitor until it receives proper activity then automatically restore WAN #1.
The network-wide ad block is pretty great. I'm sure people who have Pi-holes know what this is like. Really makes loading certain websites much faster -- even faster than with browser-based ad block.
Also has typical features like IP address reservations and such. Plus lots of VNP, VLAN and dual LAN features that I'm not using currently. It also has some built-in category and per-app blocking, like porn block, forced safe search, blocks for Facebook, Twitter, SnapChat, Instagram, YouTube and some games if you've got kids that need managing, plus some timers and schedules for blocking/unblocking these sites. I don't have kids living at home any more, so I personally don't need any of the parental features it has.
I think Ting in my area has problems due to all the construction in the area... several new neighborhoods going up. We have the same problem with electrical power -- it can be a clear, sunny day with no significant wind and power will go out for 5-10 minutes for seemingly no good reason. Very frustrating. Getting better over the 6.5 years we've lived in this house, but I've got UPSs on almost all computer and network equipment.