Bass traps are not as diverse as electronics but there are different builds for different frequencies, some are more attractive than others, placement matters, etc.
You have a very nice system. Not knowing what bass traps you use, I imagine they do not do much below 100 Hz unless they are range-limited. While the one sub provides all the bass you may need or want, another sub or two would likely make a noticeable improvement in terms of reducing comb-filters and standing waves below your traps’ effective range. If you can get one on loan, you might want to try it out.
And then there are the active bass traps...

