gears, tyres, saddles, pedals etc. are personal choice, not sure if anyone can tell/advise you what suits you better. you are an experienced rider and know which gears you tend to use and what you like or don't like about them. in my view the most suitable gears for wide audience would be something like 42/30 in the front and 11-28 in the back. i wonder if those bikes would be easier or harder to sell. i often see bikes (usually hybrid) parked with their big ring squeaky clean while the middle one is worn and oily.
after lots of experiments and calculations my personal choice is single ring in the front for simplicity, reliability and linear gear change. i much prefer bigger steps between the gears as it means less shifting, and i can't be asked to shift too often. i still need to shift twice when climbing seated/standing.
for non-racers the right choice of gears is not about speed, but about convenience i.e. "is the shifting smooth and flawless", "is the drivetrain quiet in all your preferred combinations", "have you ever had a chainsuck", "do steep hills defeat you" etc. (racer would only care "if this bike allows to go as fast as i possibly can")
so, getting back to Yello's question - i'd say leave a triple as it is or build a custom gearing from scratch.
p.s. and don't listen to Aperitif about my fitness or mental state - how can he know?
