Sole Soul, I'm not talking about selecting the end of the tech tree, just doubleclicking on a tech a few steps down the line to get what I'm going for fairly easily. Should be an obvious feature.
I found a game example that convinced me that the game does let you set long term strategies and go for them. They just don't really come into play in the demo. So I bought it, and have battled my way through the download system and can start paying soon.
Doesn't work that way, sorry. You can only select to research the techs you are currently able to immediately research. Selecting a tech that isn't is possible, but it won't change what you're researching. When each tech is completed, you are prompted to select a new tech to research. By default, it will select the next tech in line. If it's a terminal tech, it won't-rather, it will scroll to the top of the list, or in other words generally the cheapest tech, and you'll need to select a new one again, rather than just clicking done or double clicking.
Then you might be disappointed.
I stated that my examples were extreme, but I was trying to make a point. Even if you simply want to tech immediately from particle beams III to phasors, circumstances may require that you pick up token defenses first, or even real defenses. You might discover you need more soldiering as the AI won't stop hitting your border planets. The game changes every time.