I think first off, they need to add more ways of getting GOOD power...
Solar is overused, but crap.
The new wind turbines... I don't like maintenance, especially if I have to be 100+ blocks above where I am living (also, cabling that area would be annoying)
The old turbines are as crap as solars
Water mills are decent, if you have a way to automate filling them with water buckets... otherwise it's crap power.
Generators burn coal, and stuff, which is fine. But solid fuel isn't really interesting to automate.
Geo-thermal is decent... but getting lava is just a pain, and not very realistic. I'd much rather it be converted to a steam reactor (lava + water = power. 50mb lava for every 1000mb water, or something)
Then everyone's favourite... Nuclear reactor. No matter how much you try to convince me, something that can blow up (with me at the wheel) will blow up. And I hate when stuff like that happens. So it could output 1 billion EU/t. I still wouldn't use it.
Ideas of what to add?
BC integration - Diesel powered generators (basically how most of the world is powered)
Gas turbines (different to steam, these use methane... don't ask how you'd get it though) - Another real world power source
Hydro-electric dams (they would only work in river biomes, and need to be at least 5 blocks wide, etc.)
Then, you can consider "fixing" the power grid