I think this change would make managing parks more fun. Dinosaurs like raptors should require electrified fencing, and when the power to the fence goes out, they should seize the opportunity, and breakout. Only really determined dinosaurs should be able to break out of electric fences when the power is on. Afterall, it wasnt the storm itself that caused the downfall of Jurassic Park, it was the power to the fences going out. If there are more ways for the power to get knocked out, it would make managing breakouts more fun instead of "oh theres a storm, now all my carnivores will breakout no matter what quality of fencing they have" itll be "oh theres a storm, I hope it doesnt knock out the power to my raptor or tyrannosaur paddocks. That would be so difficult to clean up." Making other causes of outage, and adding more, would really increase this feeling, too.