Yeah I found it let me gauge the limiter in real-time rather just relying on K-Metering and hoping the attenuation wasn't affecting to the dynamics too much. In the end, after a touch of "tape compression" and bus compression before the harmonic maximiser and limiter it really helped me keep things in check without wondering.
I was pushing the volume for an EDM mix however trying not to kill too much dynamics with have very little headroom which seems to be the trend these days. I acquired a few reference tools. Waves NX which simulates stereo over headphones (if you were in a treated room). Not quite got the hang of that yet but it helped a bit.
For phase and correlation checks, frequency analysis I use VSL Suite plug-ins. These are also VST3 so are good on resources. Thanks the info about the other plug-ins.