But the Force had awoken by the time the boy summoned the broom. Didn’t you feel it?
“…yes” (spoken in deep menacing voice).
Seriously though, I myself (and this is entirely my own bias here) don’t like or embrace the idea of the Force having a will of its own. I don’t even like the ‘balance’ stuff. There was no ‘balance to the Force’ back in '83, or even a Sith ‘rule of 2’ for that matter. The Force was just an energy and certain skilled people got to tap into it, for good or for ill.
When Snoke said “there has been an awakening” I took it as “someone is tapping into it in a way we haven’t seen in a long time” - that being Rey who, to my mind, had huge natural potential and had basically ‘self-trained’ to an extent under the duress of her Jakku lifestyle. Even though Rey is…uh…overpowered…there was still a logic to it that didn’t necessarily point to the Force having its own will or trotting out another ‘chosen one’. I just thought Snoke was feeling the ripple of Rey’s coming into her powers.
I can’t explain Broom Boy. Maybe he was bitten by a radioactive Lightsaber…