There has always been a direct correlation between economic growth and the cost of energy: The cheaper the cost of energy, the greater the economic growth. While it is true that low oil prices will negatively affect companies that deal directly in them, the opposite is true for the rest of the economy. If the price of oil remains low for the next few years, there will inevitably be an increase in economic growth throughout the world. This is because there is a "ripple" effect whereby lower oil prices translate into cheaper goods and services - cheaper transport costs a) allow producers to sell their goods at a higher profit margin, and b) allow consumers to have more disposable income left after purchasing them. In short, cheap energy (which means plentiful energy in reality), is a win-win for the entire economy.
As for the "debt supercycle", I am getting more and more convinced that the economy is actually about goods and services that people and businesses produce and consume. Debt and money are simply numbers which affect how much a person/business/government can purchase or produce something. If there is cheap and plentiful energy available to an economy, the numbers involving debt and money will tend to balance each other out more quickly. Prior to the 1980s and the birth of neoliberalism, sharemarkets and debt markets grew at the same pace as, if not lower than, economic performance. This changed from 1981 onwards, as nations began cutting taxes on high income earners and businesses in the hope that this would spur investment. It did spur some investment, but over the long term all it did was create a huge bubble of debt existing alongside skyrocketing sharemarket indices (like the Dow Jones). Flush with massive amounts of cash, the rich and the corporations made money and profit simply through a debt/sharemarket/property balloon. Unlike previous generations, in which what went up went back down, monetary policy (interest rates) was able to simultaneously stop any crash and keep the bubble expanding. Instead of popping, the investment balloon remained and still remains very big. What has changed is that the economy has slowed down. A pre-1981 economic system, in which taxes on the rich and corporations remain high and significant economic resources are transferred to ordinary people, will result in higher economic growth (alongside lower debt levels, lower property prices and lower share market indices).
The Energy part of the equation here is important because obviously a market economy that is dependent upon fossil fuels is more likely to experience peaks and troughs as oil levels move from plentiful to scarce. If the world economy was a game, and if global warming did not exist, it would be far better to pump out oil continually at a pace beyond demand, ensuring that a large reservoir of ready-to-refine oil exists above ground rather than below it, and by doing so keep energy flowing into the economy at a stable pace. But because energy is in the hands of market forces, this doesn't happen.