Impulse response has to do with focusing sound. Smearing is in issue which blurs the image of the music. Fixing the impulse response is similar to focusing a camera lens. Sharper edges around sounds, focused singers and instruments in space... Looks like you did everything right and you don't need to make any changes... However, you can now reload this project and move the curve to recalculate the calibration for more bass. It's up to you to determine your own preference in your room. No right or wrong.
About your bass just sounding 'ok': Quite often we get used to bad bass and develop habit of accepting peaks and valleys as good bass. Dirac has now removed your peaks which now allows you to hear all bass frequencies at the same sound level (flat). It's actually much better. You just need to listen to many different songs over a period of time and you will suddenly realize how much more balanced it is. And as I said, you can still move the curve to give you more of this balanced bass. You don't loose the calibration when you move the curve, you're just making that calibration louder or softer at different frequencies.
If you are missing your bass just grab those little balls on the curve and drag them upward. Create a slope gradually increasing from 200Hz until you get to your limit of 16Hz With 16Hz having a 4 to 6 db increase. The program will recalculate a new calibration on the fly once you let go of the ball. You can then export the new resulting calibration and listen to it. See my image of what's called the Harmon Curve. It represents a +4 db sloped increase. Right click anywhere on the curve to create new points. You can add as many as you like, or just download pre-made curves from the internet like I did. Then you can store them in Dirac and pull them up as needed... Btw the way, the db level will show when your mouse is hoovering over the yellow balls (points). Good luck and happy tweaking!