I also don't like how they added midichlorians halfway through ROTJ (Luke implies their existence to Leia). When Luke told Obi-Wan he wanted to be a Jedi there was no test to see if he was magic or whatever. It kind of ruins Han Solo's character too, because there was great irony in his disbelief in the force despite clearly relying on it in combat. Now that's impossible and he was just that impossibly lucky this whole time. Even R2-D2 has a little bit of this. Not C-3PO, although he has a massive slave fetish and refuses to go "against his programming" and pretends he doesn't remember anything before his supposed memory erase despite frequently having Freudian slips, so I could see him disavowing any semblance of the force. He reminds me of Waylon Smithers in that way. This is not normal droid behavior, other droids can completely change their function after going so long without a memory erase, so this is his own problem.