Players should be able to unlock all 3 levels, both Machine and Space, and the Train Vortex Delivery a lot sooner in the game’s progression. These are more of a QOL items than gaming rewards/shotcuts.
In general, earlier game allowance for full range of building capabilities means less frustrations via reducing restrictions, redesign and rebuilds, especially so during replays armed with matured blueprints. Late game 3rd level unlock is not valued and only causes needless frustrations.