I am fixing up an old 10s miyata sports for a friend...doing about what you would do to a flip...repack, new cables, etc. The bike isn't anything special but I have alloy replacements for a bunch of steel parts (handlebars, wheels, brake levers). I also have some derailleurs that I can swap out...
The bike came with Suntour Honor RD and Suntour Spirit FD. I have a random shimano Altus FD and Eagle GTO RD (seems like a really long cage compared to the suntour).
Any point to switching these out? The Eagle GTO RD seems like heavy junk but the altus might be ok. Also, I am putting in 6s cassette unless there are any pressing reasons to stick with the 5s (they both look like they have little wear but the 5s is rusted to hell and the 6s is clean).
Finally, I am probably going to switch from the suntour stem shifters to a pair of shimano stem shifters. The shimano ones have longer levers and they ratchet in one direction...this combo might make it easier for her to shift.