Yeah the change to solar panels was 100% needed. On my old world that used the old GT recipe for advanced solar panels, once I had a quarry set up I could pump them out mindlessly and never worry about power. I had like 10 powering a quarry at full speed which made getting resources much easier and about 80 powering my base meaning I never needed to worry about power. The fact it was completely free and needed 0 maintance just made the mod too easy.
New world I'm forced to explore differnt options (I use fuel and combustion engines to power my quarry, using tesserects), and I have a windmill array set up above my house (Windmils, unlike solars, have to be put up extremely high, and require a lot of resources to get an array set up, which means I also can't spam windmills to power my quarries.
Nerfing solar panels just made all the other power options viable, really.
BTW if you really want free easy power make two liquid tesserects and pump lava from the nether into thermal generators in your house. You only need to move the pump every few days, a single pump can maintain about 18 generators constantly, and it outputs something like 432 eu/t. If I felt like it I could set up multiple pumps and have all the power I want.