We've made tourism bring in more money and military ships cost less to upkeep along with significant changes to how much research costs, especially late game.
My bolding.
Original post is irrelevant; I now see the changes made. When all else fails: Play the game.
I find the mechanism used to change costs interesting, but not necessarily worse than what I envisioned. While I was more so expecting a change in either base cost, tree prerequisites, or perhaps even changes to how certain types of techs impact tech inflation, and maybe even the tech inflation cap, this certainly appears to get a large portion of the job done.
Thank you for that. 
However, given that I can't as of yet see how late game techs were reduced in cost, I suppose the inflation changes are still possible as well.
In addition to the above, I would like to clarify that when I suggested that weapons trees cost more (as they do in DL and DA, largely due to having more techs to research), I was not suggesting that defenses cost more as well. I am aware that this may no longer exactly be up for discussion, but I still feel that the weapon:defense tech cost ratio was better in DL/DA.
In any case, I am still curious about those weapon branches on the tree that simply don't go anywhere any more-or rather, that one cannot get to (not that they're necessary or produce bugs by being that way).