Is it too much to ask for CSM to get something decent for once? We get two old 6E supplements with new formations. No decurion. Half of the formations for Crimson Slaughter require Possessed. Loyalists get a book with decurions for five different chapters, special rules, relics, and warlord traits for each chapter, and what looks like four new psychic disciplines.
The only formation that includes anything other than infantry is Kranon's Helguard, an old one from a dataslate (Advent Calendar 2014) that includes Raptors and a Land Raider, allowing you to use everything from the DV box and the CS expansion box to it. Every other formation is only infantry. No walkers, no daemon engines, just infantry.