Ulrich said:
After 20,000 years of organized study by thousands of Jedi and sith, jedi could sense and react to danger, run fast, move objects, and sometimes influence weak minds.
After 30 years with a total of exactly 3 Jedi, Jedi can now rip ships on full thruster from the sky, bring people back to life, fight through force-space-time, teleport objects, fly, and who knows what all else. It's not exactly a small incremental change, it's a quantum leap when one shouldn't happen.
It's in the title of the first movie. The Force Awakens.
I was actually hoping they'd go the route of the Jedi essentially suppressing the force powers over the last thousand years or so, or having all of that knowledge lost somehow and now it is back. They didn't really explain it at all. Maybe back before the days of councils on Coruscant and before the Jedi had tamed the Force into something very stoic and boring, there were those who could perform great wonders. Maybe the Sith and Jedi each lost a lot of their knowledge somehow in some great calamity or battle. Maybe something sparked some sort of awakening in the force.
Palpatine seemed to be familiar with the idea of a force dyad, stating it hadn't been seen for generations.
The retconning in the future support books / material will be fun to watch.