I had a similar idea to "Suggestion: Power Divider" andoriginally posted it under there. I think I may have broken a convention by doubling up a thread. Please correct me via PM if I'm wrong. I've reposted it below.
The basic thought is a machine/cable that would be a mix of cable and MFE, and the opposite of a relay.
Functionality I won't get hung up on geography, but I'll pick one just to explain the idea. Suppose that from its four sides, the block functions exactly as would a cable. However, either from the top or the bottom, it would function thusly: if there is a need on the other side of the cable, then it transmits an amount of current that would be set by EU Manipulator.
Proposed Example Use A 5-block-long cable connected to multiple machines. Normally, the fifth machine would not have enough power to work. One splitter per machine could be configured to draw the 2-3 EUs necessary and no more, freeing the remainder to travel down the line. So instead of 64/32/16/4/2/1/0, the current in the line above the machines would be 64/61/58/55/52, assuming all the splitters were set to 3 EU.
Second Example Use A line of cable from a generator plant. The output from each splitter could be wired to MFE/MFSUs in parallel. As each storage-unit filled up, there would be no draw from the splitter, and the full current would pass on from the splitter to the next splitter. Same amount of storage as in series, but the output from the entire thing could be redstone-set to be stronger than just 64 EUs. The first MFE would overflow and transmit if there were to be wired in parallel normally. Generally, the advantages of a parallel storage array without having the MFEs transmit overflow current. Naturally, the dangers of HV might apply if one went overboard here, but in contrast to just using HV, one could wire luminators to this sub-HV current - like an obelisk of them from ground to build-limit. 