Been trying the snapshot build for a week now, so far I found several issues,
- CPU Core 0 usage always peaks around 80-90% usage on high bandwidth usage even with hardware NAT enabled (tried irqbalance but doesn't seem to work)
- Wifi is unstable, experienced frequent disconnects and latency spikes
- Encryption/Decryption is really slow for VPNs
I believe these issues are due to the lack of NSS drivers available and you might find it interesting to test out the packages here which I now also personally use, and so far mitigated most of those issue.
IPQ807X NSS Build - Community Builds, Projects & Packages - OpenWrt Forum