Was GW190521 the result of eccentric, non-aligned black holes merging?

On May 21, 2019, a ripple in the fabric of spacetime swept over Earth at the speed of light.

These pass through us all the time, but this one was strong enough to warp space noticeably, at least to the detectors used by the LIGO/Virgo collaboration. As the waves passed, they compressed and rarefied a set of lasers beams, causing their lengths to change by a tiny, tiny amount: About 1/1000th the size of a proton. But it was enough.