I mean, that indicates an insane lack of playtesting and designers who don't know what they're doing, frankly.
Maximizing success/power is not a hard thing to predict. I hate to praise 3E, but this 100% seems like the sort of thing the designers for that would have considered as possible/likely. Being naive as a designer is never a good thing nor to be defended, imho.
All of this particular stuff screams "We did no playtesting of these changes at all", honestly. I'm sure in reality they did do some, but it seems like maybe they leaned way, way too hard to the very limited results they allowed for from the surveys. There's a lot of stuff here that reminds me of some of the worst mistakes of early 4E. But 4E was designed around rapid patching and updates. 5E so far has been explicitly designed around absolutely no errata at all if at all possible, and has done like a handful of balance changes at all. Even to fix/clarify this they'll basically need more "real" errata than 5E has even had so far.