I love my shields, I have both the tube and the pro in different rooms. I like the Jellyfin AndroidTV app more than Kodi. I have side loaded a different launcher to avoid the ads.
I would love to try and replace it, but it needs to be able to handle 4K UHD rips with hdr and the original sound tracks in ATMOS or whatever.
If your router/firewall is configured to let these broadcasts through you have a problem. If it is working correctly and you have an attacker on your lan? You have already lost.