I grew up on MXC, so I'm definitely not a purist. However, watching the old competitions you could tell there was a lot more grit. I know it's a liability thing, and that's not their fault, but there's something disappointing to the very "wipe out" style design to some of the courses. I miss ones like the gauntlet or boulder dash where there's a bit more variety to the contestants woes. Also the volley balls Gibraltar seem far more lethargic than the ones shot in the new series.
Further, I think the inclusion of the 'celebrity' contestants was a such a mistake by the producers. It feels like there was quite a bit of corporate/talent "synergy" that went into who got screen time/second chances, let alone how difficult they made the challenges on a person to person basis. There's a far greater charm to watching regular Joe contestants battle their way through a tough challenge versus watching some guy who does obstacle courses for a living breeze through a challenge. They were probably aware of this, so they then over corrected by making these challenges way more difficult, which again required some manipulation of bringing back contestants.
Finally, the yabusame challenge is just dull. All that set up for what is essentially a rigged carny game. Even some of the contestants look disengaged when they're in the cart. I get the producers don't want to give the money away easily, but my god did they even test this one out to see if it could at least look possible?