The technology development in the Classic period was not as far as those in the subsequent centuries (especially after XVI c.) but was far from completely not present.
Here below some of the invention or improvement on existing techs during the roman empire:
https://en.wikipedia.org/wiki/Roman_technology#Technologies_developed_or_invented_by_the_Romans
Some people totally underestimate the importance of technological advances (as well as spreading and using them) in antiquity because they are not the GROUNDBREAKING, changing the world in a decade kind of advancements of the later periods(like printing press or industrillization).
But the antiquity technological / scientific advancements are just as important, they just need to act for a longer period of time to be impactful. Your link hopefully shows some of this....to name a few hydraulic mining, military surgery and even the codex. There is also the issue of (besides new technological advancements in the time frame) how will tribes or other nations use the inventions / science that were made previous to the game time but they are not embraced and spread throughout the world (like the greek classical era advancements) which the romans totally embraced and developed in almost all aspects.
Edit: technology is important, it needs a good system. What that might be gameplaywise is beyond me, but suggesting that it ain't that important because ancient civs didn't do much is wrong.