I am fortunate/blessed to have traced my tree back further than the 1837 beginning of civil registration in the UK. Therefore 99.9% of my dates are the church-recorded baptism/christening, marriage, and burial (rather than birth and death).
In the left-hand panel index, only the birth years show up. So I have huge gaps next to people with the same name (25 John Haywoods and counting!) who can only be recognised by their christening date, as they didn't have a birth date recorded.
Are there plans for the Index to show christening dates where there is no birth date?