All I have to say is if you don't want feedback on an announcement, make it a real announcement and lock it. The only other option is to delete posts you don't like.
As to pricing; my main concern is the significant increase in pricing on Matrix games. Even Matrix admits they are in a niche market. Making the barrier to entry higher and higher with no demo slowly tightens the noose on the market. Only someone tightly tied to Matrix will spend the time to research a game and then take a $70 risk. Every time you release a data pack, you might catch the interest of a semi-casual wargamer. But it must be quite a shock to realize they need to drop $100 to play Market Garden on this engine. What you should do is drop the engine price each time you release a datapack. Once someone has committed to the engine, you have a much better chance of selling data packs. But instead of trying to draw more people in to spread the development cost burden, the easy way is being taken by raising the price as the community shrinks. One business model is positioning for growth, the other is positioning for a slow spiral down. That is a business model I have seen and been involved in dozens of times and it will not succeed in the long run, no matter how special wargamers tink they are.
And what happens on these forums is that higher barrier to entry for a three year old engine slowly pushes any balancing feedback out of the forum and strangles diverse opinions as only people truly dedicated to the game stay on. Its the same issue BFC had with CMSF in the end. Now you end up with a mob mentality that seems to be drawing in the developer as well. Again, very similar to BFC.
But obviously, no one here is looking for a diverse opinion in this little (and it appears to be little) club. So my rant is most likely moot. I hope that this meets the threshold for constructive feedback.
Your "rant" is important to the people who want to market their products to customers such as you.
To others, who never ask anyway, it doesn't matter.