Seriously?
o.o
Seriously.
http://wiki.ffxiclopedia.org/wiki/Nidhogg
http://wiki.ffxiclopedia.org/wiki/King_Behemoth
http://wiki.ffxiclopedia.org/wiki/Aspidochelone
^
Minimum 72 hours between pops.
One pop per server.
http://wiki.ffxiclopedia.org/wiki/Proto-Omega
^
Minimum 144 hours to pop,
if you farmed all four chips in one day with an LS of decent size, and then the 72 hour wait before you can re-enter Apollyon.
http://wiki.ffxiclopedia.org/wiki/Proto-Ultima
Minimum 216 hours to pop,
if you farmed all three first-tier chips in one day, then the 72 hour wait to farm the tier two chips, then the 72 hour wait to farm the actual NM.
http://wiki.ffxiclopedia.org/wiki/Dynamis
Needs no explanation.
http://wiki.ffxiclopedia.org/wiki/Salvage
Requires explanation simply by virtue of
how ridiculous it was.
http://wiki.ffxiclopedia.org/wiki/Citadel_Chelonian
Maximum one per day, two if you did not go the day before, which is, really, one per day. Also required 1,500 Assault points, which necessitated usage of two Assault tags, which necessitated not farming Nyzul. Or, if you were really good, one assault tag, which still means not farming Nyzul, because you only got one per day. Yay!
3.1% drop rate, same as what you're complaining about in XIV, only guess what? You can only go once per day, as opposed to however many you like.
http://wiki.ffxiclopedia.org/wiki/Skirmish_Pephredo
Same damn thing, except it was not even guaranteed to pop. My LS was 2/144 attempts, he popped on seven of those 144 runs.
http://wiki.ffxiclopedia.org/wiki/Qiqirn_Astrologer
Maximum two per run, once per day. 6.7%.
Going for any of these Salvage NMs meant not going for the others listed.
http://wiki.ffxiclopedia.org/wiki/Sarameya
Required farming several tens of thousands of zeni to pop, which required either (A. Coordinated LS effort, or (B. if you were trying to get one for your own, to get an item, turning in at maximum 1,500 Zeni once per game day (every one hour). You would be fortunate to complete one a week, rounding people up to kill it. Drop rate ~13%.
I could go on.