Well, it's all how you define "masterpiece". If you define it simply on scale, then yeah, they probably are not worthy. If you define it on sculpt, G1/'toon accuracy, quality of design, articulation, accessories, etc... then you could argue that they are still spot-on.
I don't like 'swipe being so small, but according to the animation scale guide, he's just the right size for MP-10. And while being the same size as a CHUG, I'd easily take him over a pile of CHUG figures, which are really not so great. They are flimsy, kibbly, poorly sculpted, loose-limbed, and far from G1 accurate. MP still fills that need for "perfect" figures even if they aren't quite as large as I'd like.
I have about decided that I'm done with CHUG figures. All those cybertronian alt modes and shitty designs and repaints. None of that appeals to me. I was at TRU looking at the exclusive red repaint of Kup, aka Swerve. And I thought to myself, "My collection will not feel lacking without this. I just don't need it. I'm not sure I need any more non-MP TFs at all." I have more than my kids can ever play with, so at some point, collecting it seems more like a burden than a hobby.
But on the other hand, the 3rd party combiners are beyond cool. And some other 3p stuff as well. Just got Art-feather Bumblebee, and that thing is both awesome and MP scaled as well. He might even be a bit larger than he should be for MP scale, but since he's still noticeably smaller than 'swipe and Red, it won't feel out of place. Easily worth the jack.