Yeah I got those too.
Turns out BB is following Necromunda and Warhammer Underworlds and now includes faction specific cards in addition to universal ones

This works well with Warhammer Underworlds which has clear intention and even balance (official formats, banned and restricted lists). But arguably less functional in Necromunda. And now in BB too.
I'm also interested in the new (?) pitch rules for Skaven/Dwarf pitch.
What's strange is, each team in previous edition (BB2016) did have a handful of "faction specific" cards for the teams released then. They were universal, but had fluff and context for one specific team. And some of those have been copied over to current edition (BB2020) as universal cards!
To put it in other words, any faction specific card for this edition could potentially be an universal card in the next edition (BB2024?).
What really sucks about the new faction specific cards is that they often apply to specific players of that team, so not usably by any other teams.