My 10mo ds is much the same - but I would be careful of labelling this 'fussy' - we tend to see it as, some days he wants something and some days he doesn't. ds was mad about broccoli, then for a few weeks he completely ignored it, as if he couldn't even see it - then this week, he can't get enough of it again.
One of the reasons we went for blw was wanting to present all foods as equal - he doesn't know that fruit/yoghurt would usually be a dessert, or 'treat' - that could only come from us framing it in that way. Like CosmicMouse, we present everything at the same time - so, ds will grab a mouthful of fruit, followed by some meat, followed by some pasta, then a spoonful (which he holds) of yoghurt, then more pasta... Sometimes it seems to be that he needs to whet his appetite with something he knows he likes (and that he knows how to eat - can take him a few goes to really get the hang of new things, and then sometimes he seems to 'forget'), then he'll get on to other things - and there have been quite a few occasions when I leave something on his tray and he ignores it all meal, and just when I think he's finished (each meal usually takes an hour!), he picks it up and eats it!
I don't know about the fruit - ds is the same with it though, can't get enough - we brush his teeth everyday, but might be worth checking with the HV?
Everything I have read and witnessed about blw shows that it is the best way of avoiding bad eating habits in later life. Provided he is eating, and you continue to offer a range of food for him to try, without attaching values to individual foods or whether or not he eats certain things, pretty sure it'll work out. Good luck!