f17r

[-JKP-]

...

If you are suggesting or arguing for a different letter than "ll" due to this dramatic height difference in the ascenders, there is always the possibility of "adder" (as in a snake) rather than "aller".

It would be highly unusual for a figure-8 style "d" to be angular or for the lower loop to be so tiny, but I like your suggestion to try to look at it from a different point of view, possibly as a different letter entirely (I'm not sure which one, but it's strange that the ascenders are so short).