As a long-term idea, it might be useful to add the possibility to save information on nuclear structure, i.e. the HFS A and B (and C?) parameters, and isotope shifts per isotope for specific transitions in the scheme.
This could then also be linked to an interactive/automatic display of the HFS for a selected isotope, transition and projected resolution.
Brainstorm example for Sb-119 on the 0 cm-1 --> 45 945.34 cm-1 transition (not in database yet) attached.
Sb-119.pdf