Not really - an exploit is essentially utilising mechanics in such a way that achieves results that was not intended.
FTR regardless of whether they are considered an exploit or not, I do not see there being any issue of significance with using nominally undersized but engineered kit.
Feel free to prove that it was unintended then. So far you haven't. Insisting that they took it out because it was unintended doesnt prove that they took it out because it was unintended. If it was unintended Fdev would have said so instead if saying there were looking at adding it in again at a later date. They've been pretty upfront about that kind of stuff.