On my recumbent, the granny on the triple is tiny but it only provides a very small difference in the middle ring/large cog gear. I only need it occasionally but I'm glad it's available.
I'm curious to know what chainrings you have on this bike. I have two bikes with triple cranksets. One is 52-42-24 and the other is 44-33-20. There is a very noticeable difference between the middle ring and the inner ring no matter which cog on the cassette I am using. The 52-42-24 triple uses a 13-28 cassette in the mountains. There is a world of difference between 42x28 and 24x28. The 44-33-20 triple uses a 11-32 cassette. There is a pretty good size difference between the 33x32 and 20x32 gears.
Lots of people for unknown reasons leave their triple cranksets as it came from the bike factory. They are not wise enough to put on the smallest possible inner chainring. Road bike cranksets come with triples with 53-39-30 chainrings. That 30 tooth inner ring is idiotic. All these cranksets use 74mm bcd inner rings and can accept a 24 tooth inner ring. Why people use triples with 30 tooth inner chainrings that aren't much lower than the 39 middle ring instead of a truely low 24 tooth inner ring is a mystery.