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I dont really think a gabba does those things, it might for a short while but then once its saturated it wont. But that's personal opinion.
Maybe do as suggested above and black a gabba out with pen.
Thay endura will keep out a shower/drizzle but not rain. But it will breathe. You cant have all of those things. You were right looking for a softshell, the old pro team softshell by rapha wohld be good. Basically same face material as the endura which is polartec power shield pro. Not sure about other brands, not used their products.
I'd buy something made of polartec power shield pro. It's a lot nicee than the neoprene the gabba is made from.
https://polartec.com/fabrics/weather-protection/power-shield-pro
This.
Seriously though I'm not looking for a do it all, I know that doesn't exist (yet). I want a windproof soft shell that will hold off light/medium rain and will keep me warm when it does soak through. I always pack an additional hardshell, that's not what I'm after. I've owned a Gabba, it does what I want, I just don't like the styling.