As always, as tech increases the size of individual components shrinks, but there are more of them. Increasing complexity in monitoring and trying to wring the last few percent of performance from a given power source at higher tech levels would IMO lead to more interconnects, not less. Think of the evolution of the internal combustion engine - in the late 19th century, there were only a few feet of wiring in any given vehicle. That has grown to the point now that many cars have miles of wire connecting the various systems - emissions control, engine monitoring & optimization, accessories controls - up to 8 or 9 different systems.
I've never really bought into the Star Trek conception of engineering spaces, especially on a warship where battle damage is expected and planned for.