There's really no changes for 2019.
Hemostatics:
There's some suggestions that chitosan based hemostatics may work better with coagulopathic patients on blood thinners (your wife), but there's nothing definitive saying that it's
better than Combat Gauze (the entire success story of CG is based on coagulopathy). Both are considered acceptable and are treated interchangeably within the medical field. So, Quickclot Combat Gauze and any chitosan based "gauze" such as ChitoGauze, Celox, or HemCon. Go with chitosan based ones if the marketing gives you the warm and fuzzy.
You want to avoid any granular, sponge, or applicator based mediums of the above. Stick with full-sized gauze forms, and not reduced size versions such as the
QuickClot EMS.
Tourniquets:
Both the SOF-T-Wide and Gen 7 CAT are the current front runners. The SOF-T-Wide is indestructible. We've started reissuing CAT's with the Gen 7 coming out, FWIW, but myself and many others still prefer the SOF-T Wide, simply because of its no nonsense durability and long standing track record. The CAT, on the other hand, was banned within the SOCOM umbrella for a number of years due to its issues (which they've hopefully addressed after 7 generations).
Both are considered acceptable devices within the TCCC community. Other alternatives do not have the track record that either of these have, whether in actual field use or large scale testing.
Training:
This is the more important part.
Simply using a hemostatic gauze isn't the solution. Knowing how to use it is more important, as the technique is really what determines its effectiveness. If anyone tells you "just pack to the bone and don't worry about it," go elsewhere for information.