The bar shifters are much better than the down tube shifters. I have a friend who has a similar road bike to yours. He still uses it as his primary road bike. He prefers the down tube shifters, which generate quite a bit of attention from passing riders.Got my 1985 Trek 560 racing bike out several months ago and have gotten back into putting serious millage on it ( or really lots of hill climbs). After pulling everything apart for a good cleaning and greasing I replaced the front cranks with shorter crank arms and slightly lower gears (original 52/42 now I have a "compact" 50/34) Made a difference climbing all the hills around here, but could use a bit more help with the mountains...
Now I am thinking about getting a full new component set (probably Shimano 105) new wheels and of course a nice new paint job.. Riding in crowded conditions in the city, I really would like to move shifting to the handlebar like on the newer systems. It would easily be as good or better than the SCOTT aluminum I took for a test ride last week.
My road bike is a 2004 Fuji. I bought it in 2008 and the original owner upgraded it to Shimano DuraAce components. The rear derailleur finally bought the farm last year and I replaced it with a Shimano 105. I honestly can't tell any difference. The biggest issue is that the gearing on the bike was perfect when I was 20 pounds lighter. Now, trying to lug those extra 20 pounds up a hill with the gears I have is a challenge. I could go to a larger cassette on the rear or change the small front chainring to a smaller one, but I figure it's probably easier to lose the weight. I was actually considering retiring this bike and getting a more gravel-oriented bike with disc brakes, but the pandemic put a stop to those plans, since my music hobby pays for the cycling one.