I thoroughly enjoyed the Inglès.
You are correct in that it is nowhere near as busy as the section from Saria, but it does still host quite a number of pilgrims. Possibilities exist to walk shorter stages, so keeping it down to 20 kilometers (or less) a day is very doable. While most walk it in five days, there have been many who have taken eight or more. Should you decide to walk this route do book Bruma (or stage around it) it's a well-known pinch point.
Yes there are indeed a couple of steeper climbs, however they are relatively short.
You might find this from
@Elle Bieling useful:
The less traveled Camino Inglés or English Way, gives you the real opportunity for experiencing the Galician culture.
www.pilgrimagetraveler.com