Analogue front end. You want more weight, scale and dynamics.Where do you start upgrading?

The biggest change to a turntable is always the cartridge. Always. You will need to ensure that the cartridge is compatible with the tonearm and phono stage, SUT and/or head amp.

The second biggest change to improve your analog setup is... speakers. I know, controversial. But you asked for the biggest change and the first and last transducers always make the biggest impact on the sound of your system.

You seem to have all the answers already. 

“You want more weight, scale and dynamics”

Turn up the gain?

Direct drive versus previous belt drive tt’s did it for me.
which was Direct Drive ?

@martinl07d Assume you're speaking to me. Belt drives I ran included highly modified Thorens, stock Rega's, a few VPI. My direct drive is Technics SP10 Mk II with custom build  nearly 100lb plinth Stillpoints for support, Jelco 12" kinife edge bearing arm. This sits on nearly 100lb stand  with 1/2" aluminum top plate with vibration sink on concrete fireplace hearth on suspended floor with floor jacks for support.  Huge amount of mass loading for this DD tt gave me the slam, bass extension and articulation,  pace I could never get with the belt drives.