I would hope that GW are a little more inventive. Completely fine with 1 addition for large armies when others need a big refresh or 2nd waves, but I have my fingers crossed that less of these additions are just foot heroes.
Sure a few foot heroes is fine, but often they just felt like bloat last edition. SBG is a good example, yet another Vyrkos foot hero when we already had god knows how many. How much better would it have been to get a mounted Vampire Lord, maybe with a named (non-vyrkos) variant but that is not necessary, instead? That maybe synergised with Blood Knights in some way (Could see that being a massive hit with Kastelai players).
So yeah, foot heroes where appropriate but would be nice to see mounted ones more often. Or hell instead of a hero just a unit, maybe a 5 man one or something. More effort yes but would often add a lot more. Also we should be moving out of the "Covid period" now, so hopefully we will be seeing more ambitious updates even to armies that are not getting a major launch, but we will see!