To let "enthusiasts" play this part with more fun (mostly for someone who are going for "lazy bastad")
- Make burner drill accessible on level 1 assembly machine.
- Make assembly machine accessible on level 1 assembly machine.
To force everyone to play more with "steamy" part, just move away all "electrical" stuff further on research tree and add unpowered version of laboratory.
Second proposal is questionable. But I'm sure the first one will be approved by part of players and unnoticed by another part. Anyway, just take another look on this part, probably your ideas will be better.