No Legacy Support On Synapse 4 ?

I have a razer kraken 7.1 v2 headset from years ago, been rewired and had 4 earcup replacements but these are the best sounding headphones i have ever had, all the newer versions i have bought just sound weak and quiet compared to them, why is there no support for the sound options on them on synapse 4 ?, its like i am just being forced to buy an inferior product to update to newer which is actually a HUGE downgrade, had many newer razer headsets and gave them all to my kids because they suck compared to these, will legacy be on synapse 4 eventually ?.