I made a mock up of a tech tree, one that really allows for an open ended style of play, as well as fits a more logical path of research. All of the underlined red techs are techs you start off with, and instead of everyone have the regular versions, they have small versions. Also, this assumes that small buildings will be up-gradable to regular buildings at some point. I also used human as the example here, since their tech tree resembles everyone else’s. The flow chart is UP, so for Goliath, I would need to research Scout, Macro Engineering, Nebula, the 3 above Nebula, and then I could go for Goliath. The idea here is stretching out Tier 1, Tier 2, etc so that while there is a lot of low end fast tech, there are a lot of middle pre-req techs to flesh out each tier.
Finally, I would like to say, there are 140-150 techs here, with Planetary Limits, and possibly diminishing returns. this example tree could last 6 to 12 months.
Please anyone, add feedback, this is just a rough draft, it uses 20 different techs that other people have suggested, as well as the combat guide techs to flesh it out a bit and make it look like something we might have in beta.
Thank you all for your time
EDIT: Would really like to see what the intentions are of the Tech tree, where they plan to go in the future, and what we can expect for Beta, and then release.