I dont think its true to say they dont care about open source anymore, my understanding is they've committed to maintain the open source version going forwards although new features are likely to be only available through their more restrictively licences plus product. I'm assuming they've done this to stop competitors easily migrating their high value investments into their competitive products. Although your ticket hasn't been responded to, I'd give them some time, the 2.5/plus launch hasn't really ben smooth sailing so I expect they are solving those challenges with paying clients first.
There has been a lot of back and forth on Netgates open source policies previously, I recall that the tools needed to build the code weren't available so even with the source, it wasn't (easily?) possible for an end user to compile their own version.
If being open source is critical to the end user, I guess their choices now is to remain on the less featured train, or jump to another solution such as opnSense or VyOS.
Interesting times for SOHO firewalls for sure.