You are not the only one who thinks there is some confusion within the Unlock levels of the Tech Tree. I found several, utterly strange sequences. Some concern SV, others CV. HV has also a weird sequence within the Thrusters. But it was said that will be sorted out in time. No high Priority.
Than it is time you start your "living" on a Dead Planet as there is nothing to "Blast through" (Dead Planet to be found in @ravien_ff Scenario Project Eden)
TBH I normally blast through these - grab shotgun, waste anything that moves etc... But as you say, the project eden dead planet start has nothing to shoot, but had plenty of stuff to make things with, so then I particularly notice the rather awkward progression with HVs and especially SVs when looking at what I can build to get around and not freeze / get irradiated.
A12 rebalances a lot of thing, even the temporary tech tree. List the problem and the improvements needed and you'll probably see it get fixed for A12. Though don't expect to make an SV before level 5, since the devs seem to be stuck on having HVs unlock before SVs.
