These DO look very good for SOOC JPEGS!!! And you'e right, showing the SOOC gives us a good idea of what the camera does, as it is configured right now. At most, I would bump these up only about 3/10 of an EV I think--OR I might lave the exposure alone, and only use the curves tool to vary the contrast a little bit.
As far as it goes, I would verify what the Tone Curve is set to, and also what the color information is set to. Different cameras tend to create smewhat different SOOC joeg images, mostyl depending on the color saturation value, and the tone curve.
I shot 75,000 or so Fuji S2 Pro images, many SOOC, and also RAW + JPEG, and Fuji really,really was capable of making beautiful JPEG images, and had a pretty simple size-sharpening-saturation-tone curve (contrast) , 4-parameter control method that did pretty doggone well for me. back in those days, Fuji .RAF raw files were VERY,very badly handled by mot raw converters, and they were large, and sloooooow to convert.
Looking back over 16 years digital, in many ways, the Fuji digital pictures had the most pleasing color out of the multiple cameras I bought from 2001 to 2012. I totally "get" WHERE FUJI has gone with their SOOC images.