Part of my reason for getting the Libre was so that I could try out the road plus thing and I must admit I rather like it. Even for pure road riding, nice light, supple 650b tyres mean that there is very little advantage to 700c unless you are racing I reckon. But I can see why you would still want that option.
The problem is, if you want a steel framed gravel bike that can run a dropper post, there aren’t too many options. If you want one in a nice bright colour too then it looks as though the Fugio is about the only option.
If you are more agnostic about frame material then the Digger Factory gets you GRX and a dropper with a lot more drop of course.