I don`t think you need to look at older more "free" tracks to gain inspiration.
If you are that bothered by there being restraints, then simply break those restraints.
The main point was that "key" players are doing this.
Well that`s cos they have been doing techno for ages, and maybe are burnt out.
Sure there are some lessons to be learned from old productions.
To see what has been before etc
But this, returning to old skool vibes, which essentially is a way of twisting what is actually happening, which is remaking what has been before.
Lets not pretend it is anything else.