The problem with both console is that you need to buy both licence to SONY and to MICROSOFT to upload a patch while the game for PC is already registered as a game for steam and they just need to upload it there.
It's a thousands way easier to export for PC and it costs less. It's a marketing choice and Rebellion has nothing to do with it.
In the case both console were using the same licence SONY or MICROSOFT they could probably extend the patch for several month, maybe until the end of this year but it's not the case and SEGA has biggest plan and so they deal with it and has no choice than stopping the support for AVP on consoles.
It's sad for the players, probably, some are against, some favourable, some just don't care, it's life, accept it.
See you on AVP2 or in the next AVP which hopefully will have a SDK and so if the company stop the support the community will extend it.