What does Unheard include? A very barebones single player or Co-Op PvE mode (EFT is traditionally PvPvE) that replaces the traditionally human-operated PMC opponents with bots crewed by some of the Boss goon's AI routines. Importantly, this 'single player' mode is still hosted on BSG's servers so even starting a single player game requires several minutes of matchmaking time, you can suffer disconnects from the server, and so on. In addition to this there are pay-to-win aspects that touch the existing PvPvE mode such as larger inventory size and an item that prevents the AI mobs from shooting at you until you're closer to them. There are also some unique-to-Unheard-owners items like a new melee weapon and an armband that appear to be Unity store asset flips.
Naturally, corners of the internet that care about this game are in an uproar about this, primarily around the revoked promise of the EoD edition including all future DLCs and the supremely barebones version of the single player mode that BSG has introduced compared to the feature full and modable 3rd party versions of the same, such as SPT or Single Player Tarkov, complete with concerns that BSG will now C&D those projects since they have their own offering.
I just thought it was interesting to see another live running enshittification in progress. In some respects, EFT was in a great place owing to several very good updates in a row and new changes/additions to the game mechanics. This move seems to be purely profit chasing and appears to be poisoning the well at a time when the community generally holds the game in decent regard.