From the very limited telemetry available, it doesn't look like a power issue, it looks like a control issue.

It's certainly not impossible that there was an obvious fault before V1, but it's _way_ down the list of likely scenarios.

Ah, a control issue would indeed be pretty much impossible to diagnose before V1. That makes sense.

I have heard of issues that were discoverable before V1. Famously there was the Russian hockey team that was killed because the pilot was riding the brake and didn’t abort in time.