Agreed. I'm still learning how to tune as well and one of the hardest parts for me is knowing which freq-range to adjust via EQ to address the tonality "issue" that I'm hearing. Just takes a lot of trial and error to figure a lot of this stuff out. Car audio tuning is WAY more involved than I ever expected, that is for sure!
If you have the Helix... I've seen a lot of peeps will use 'Input Alignment' also known as Input EQ, for their tonality. (After Tuning to speaker curve) It has 5 PEQ bands per pair of Speakers.