If I am right and the FSS is really a great tool for engineering, then it should work exactly as it does, but seriously above everything it should occupy a size-1 slot and cost 1 million, because I as a new player can't bear with it.
The only use the FSS has for engineering is that it can be used to find planets with certain materials (at least, that's the only use I have for it in that context). But, it isn't required for that. You can do engineering without it. I do enjoy engineering myself. But I also enjoy collecting materials from planet surfaces just for the sake of it. I spent most of my playing time yesterday doing exactly that (2 hours or so, I guess). Fun is where you make it - I enjoy it because I try to do it as quickly as possible, which regularly involves things like shooting the rocks as you fly over them upside down. In fact I will put together a video of last night's expedition at some point, as it shows that the SRV really is an amazing machine when you've learnt how to handle it. Currently, I am finding it more fun than flying (and I enjoy that immensely!).