As much as I am LOVING Cameron as Jerome, and enjoying Gotham in general, I still feel like they're going too far too soon.
With the Joker, in particular, one of the great things is that no one really knows who he is. I don't mind him having (potential) back stories, ala Killing Joke, but never actually knowing for certain which, if any, are real.
They kind of implied they would be doing similar in the series, at least by having several red herrings along the way, and they have, sort of. There were nods early on, like with the comedian at Fish's club, but they were always more Easter Eggs, rather than any sort of real "potential Jokers."
When they killed Jerome, it felt like they finally were actually going that route, but then they doubled down by saying Jerome would be the "inspiration" for the Joker. Because, as we all know, if there's anything that defines the Joker, it's that he's a copycat.
Of course, now they've resurrected him, which all but confirms he's not the inspiration for the Joker, he IS the Joker.
Cool, whatever, but now were back to, not only the audience knowing who the Joker really is, but Bruce, Gordon, and ALL OF GOTHAM now will know who he really is.
To be fair, I felt like Scott Snyder was sort of doing something similar with Zero Year, wherein there was a clear "candidate" the whole arc, with Bruce even tracing down the supposed "real" identity of the Red Hood leader.
However, they managed to, more or less, pull that rug out from under us, leaving it open as to who REALLY is the Joker.
'But, gdw, couldn't they just be doing exactly the same thing on Gotham?'
Yes, of course, except they kinda already shot themselves in the foot once they resurrected Jerome.
Now, I don't mind that they've established they can resurrect people. I don't mind Jerome being resurrected, or the Joker constantly coming back from the seemingly impossible. That's always been a part of his stories.
The problem is the fact that EVERYONE KNOWS Jerome has been brought back already. Hell, they even had a throw away line in the last episode about how, if they did kill him, he'd probably just come back to life again.
This makes it all but impossible for them to truly create any doubt over who really is the Joker.
The only way they COULD have put any real doubt on the notion of Jerome being the actual Joker would be to "kill" him off again. However, as everyone already has seen him come back once, no one in Gotham could seriously have any doubt, once the FINAL Joker shows up, that he isn't actually Jerome, resurrected again.