Honestly the show was okay. There is backlash of course, but only if you compare this with the previous shows and movies. But I would say that they kind of ruined Po's character; he's not even that excited about the mission but more about Blade. On that note, although Blade has a somewhat interesting backstory, she isn't as relatable. Furthermore, the animation was a little choppy. This show would probably be better if they linked it to the other shows. For example, a Shifu flashback or some sort of Furious Five appearance would help. I mean, it is an "everyone could die" crisis. But no one seems to even realise who Klaus and Veruca are. Like, if they were so infamous, maybe some China people would know them. Or at least the Colin guy would since they're all from England.
Although Po makes some reference to Shifu and Oogway, it wasn't satisfactory enough.
SPOILER ALERT:
To me, the title doesn't exactly make sense. When it is revealed that Blade isn't really who she says she is, it doesn't make sense to me.
But the "humour" was not that bad. Watch it if you want, but don't expect too much. Where is the kungfu though?