I do not think waiting for 30 minutes to for high tier stuff to be research is bad.
In fact, I think research in Satisfactory sucks and it is very basic.
Research should be totally remade and improved. Also, we could have different technologies to research that would be dependent of other more basic research tiers.
A game that do this well is Civilization or even at real time, like the research type used in Sins of a Solar Empire for example (a RTS game like master of orion).
This would add much more complexity to the game, in fact, I think the game lacks complexity.