[old_tv_nut]

This may be completely normal and you are just looking for a cleaner response than is possible when the signal goes through an IF filter with its necessary sound traps.

Check with ordinary program material and see if there is anything terribly objectionable.

People's memories of how analog TV looked have faded these days when they have gotten used to HDTV and computer monitors.

Edit: besides sound traps, the color subcarrier trap can cause some luminance ringing, depending on its bandwidth. Wider bandwidth = less rigning but more smear, and vice-versa - it's a design choice that was made for regular program material, not games or test patterns.