There are plenty of handlebar options with shallower drops, even shorter distance front to back. My wife is 4'10" and she had had issues witht that. She got some kind of Specialized bars that are down bars, but are short from front to back, and shallow to.

My Nitto Randonneur bars are also shallow from top to drops (the ergo triple bend bars just bug me... too looooooooow)

I run bar end shiftes with an shimano XT changers in back (Sora?) Anyway... yeah, bar ends are cheaper and cheaper to replace is they bust. they work great... indexed.

The core of the bike is fit... how you feel draped over it. the rest is tweaking.
If you feel comfy, then upgrade it little by little. Full brifterization will cost you a bit of do-re-mi. But you will be shifter out over your bars, so you better get that part of your ergonomics worked out first.

sounds like a cool bike