Not convinced fiddlesticks mid is good but I did lose to it so...

Fiddlesticks ult is such a unique ability, no other champ in league really relies on surprising you like that (maybe wukong flanks doublelift is a surprise idk but eh) but yeah in my game I died under tower when he literally ulted over the wall to dive us bot at 6, and left our yasuo taking a wave who he ulted to kill. Fiddlesticks is definitely the only champion who would require that specific ward just over the wall bot. And in general the choice between shadowing bot and moving to baron can be hard but I guess you have to ask on each wave, since the other team knows someone wants to go up and take the wave, if you need to cover them while they take the wave.

But yeah fiddlesticks mid weird stuff but idk it's a weird champ.