never know if it feels better or worse unless you try it.
try stiffen the rear only, try stiffen the fron only, try both.
that test n tune you had would have been an ideal time to do this...
I would suggest changing one thing at a time - Then test.
This will definitely save you Headaches & Time in the future. This can be checked in any larger sized parking lot. Just run some circles or figure 8s. Set your base times & handling characteristics first - Take notes. You might feel that the notes are redundant but you will use them in the future no matter how Shtty you think your notes are.