You did a wonderful job fitting out an older, cheaper lugged steel frame with everything needed to gravel road. The only thing wrong with it is it didn't cost $3000 dollars. I know that you will be able to ride in groups of riders with carbon framed gravel bikes and mostly keep up or even beat a few up the hills depending on everyone's fitness. OP is in a pickle with new bikes really not available that fit him or possibly retrofit a couple of his existing bikes to get the gear ratios. The Siren call of a new bike is hard to ignore. However it is easy and cheap just to change gearing on his bicycles. I have gone both ways when it comes to bicycles. All my present bicycles are used bikes I retrofitted to my specifications.
1980 Nishiki Sebring with Vuelta SL37 wheels and Raceface MTB crankset in 180mm. My low gear is ridiculous at 24 34. I have yet to use it on the street but it is there. A nice cheap lugged steel frame in my size, 69cm. This is a nice fast bicycle.