How about we treat the two MTO's as wholly separate incidents, m'kay? I was a little conflicted regarding the MTO during the final, but ultimately, once it's broken down, I don't think it was all that bad...even if Federer's actions are interpreted through the most uncharitable lens possible.
Let's ask and answer a series of questions. Was the MTO necessary? Perhaps not. Could he have gone without it? Well, he probably wasn't gonna keel over or retire from the match, but that doesn't mean he wasn't injured. Was there a teensy-weensy bit of gamesmanship? Ok, ok. Let's say there was; has Nadal made a habit of taking MTO's under somewhat dubious circumstances? Yes. Would he have done the same in Federer's shoes, if he thought it would have impacted the scoreline? Probably. Does Nadal circumvent the rules in other ways, i.e taking more than the allotted time to serve, and occasionally not playing to the servers pace? Yes. Did Federer's certain knowledge of these three factors partially influence his decision to take the MTO? Maybe, and if it did you can hardly blame him, given his opponents tendency to raise eyebrows by resorting to (superficially, at least) similar tactics. Keep in mind, again, I'm not denying that Federer was injured...but for the sake of playing devils advocate, I won't dismiss the gamesmanship claims outright.
Now, concerning the MTO in the penultimate match: OP and others are just pedantically parsing through Federer's words here. It's a waste of time to even address this. That said, I've been told I possess a preternatural talent for wasting my own time so here goes: Federer said nothing about the state of his injury. His statement seemed to indicate that Wawrinkas choice made him not have the same
reservations he would normally have about getting an
existing injury tended to during a match...unless you seriously think that Federer would admit to not being injured at all. Come on. He's arrogant, not stupid

. And really, operating under the assumption that an injured Federer
was following Wawrinka's lead, it's fair game; why let your opponent seek treatment for real-but-not-debilitating injuries while failing to do so yourself? Even somebody as bull-headed and gung-ho about that stuff as Federer (who almost never calls for the trainer) is putting himself at an insane competitive disadvantage by letting that happen.
The thing I will concede here is that the timing was conspicuous, in both cases. Fine, you win. A player with a few somewhat sketchy MTO's over the course of a 20 year career can definitely be likened to somebody who's had about a dozen comparable ones over a shorter span of time (all of which may have been legitimate, for all I know). Yes, Federer fans are flaming hypocrites for not condemning that cow-owning, Lindt-eating, neutral-country-inhabiting cretin.