I needed LBS to adjust triple Tiagra/brifter FD correctly but installing 3x9 Deore derailleurs/bar-ends was fairly easy. If tours include significant climbing & bike allows 3x then why switch to 2x? For me 3x is just logical, wider range gears with a negligible weight penalty. I once did a weekend unloaded mountain tour on a 2X racing bike but back then I was 2X stronger. At least the 52x14 let me zoom down the hills, a low-range 2x will just passively coast.