Chaos - A Brilliant Update, But Is This Really All Of It?

As we see the Chaos 2019 releases end, it made us ponder what could have been. In reality the forces of Chaos Undivided - that is the forces that aren't covered in feathers or tentacles or rot or skulls - have not had an update for a very long time. The individual powers have, but not pure Chaos - the renegades from the False Emperor. This release has been great, some very nice miniatures, but not many compared to Age of $igmar releases or even the Primaris Space Marines. So what could have been?
We first saw signs of what could have been in the Blackstone Fortress boxed set (below). This included the Chaos Space Marines design we now see rolled out across these new releases, but it also included other elements of Chaos that the Community have been after for a VERY long time. 

Chaos Undivided is many things, but at it's core it is a massive force, the vast bulk of it fleshy and spikey - so in this update where is that? The Community wanted new Chaos Cultists, like Nurgle got the Pox Walkers but less pungent! Massed legions of men and women on the move backed by columns of armour to liberate planets from the grip of the Imperium - whether the populace want it or not. Blackstone Fortress gave us a tantalising look, but we never got them! This would have been an amazing addition to this release. Also on the wish list and also in Blackstone Fortress are the Chaos Beastmen. So in the very old fluff, the Imperial Guard were able to field Beastmen in units to fight for the Imperium alongside humans. Over time this has changed, but adding Chaos Beastmen into the universe shows that there was a time that they were  fielded, but then forced out by the Imperium. Remember that the Tzaangor are Chaos Beastmen who turned to Tzeentch and they were released in the Thousand Sons wave (40K weapon frame now sold seperately), so why not these? Pretty sure Slaanesh will be getting some in their upcoming 40K release window. Another missing addition also featured in Blackstone Fortress were the Psykers - those tainted Warp-drenched fiends. Having these in a Chaos force is not only cool, but super super fluff.
There are other things we could have seen - a non-Raptor hand-to-hand Chaos Marine option, corrupted Ogryn, Chaos Commissars, even vehicles like a tank or a new flyer, and what about the models from Shadowspear - Obliterators, the Master of Possession, the Venomcrawler and updated Greater Possessed? 
It just seems this release could have been bigger - especially for the importance of Chaos to the whole Warhammer 40K universe. There's so many things untouched and to stop here seems like a real shame.
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What do you think?
Did you want to see more? What did you want to see?
And while we're spit-balling, lets have a look at those awesome miniatures we did get in this release and just hope that very soon we can see the shopping list above come true.