5.1 NIN slowed down and uninteresting

[Rivinhal]

So... why slow the combat down unnecessarily? Did they just feel that Ninja wouldn't appeal to players who don't currently play Ninjutsu casts gave a minimum of some 500 potency and needed to make it cost more uptime accordingly? And why the 1.5 seconds on Ninjutsu? We can only benefit from the ping compensation of the first half-second. Why then slow it down? Just to give room for an immediate Trick Attack every time despite that we are already used to using Suiton up to 20 seconds in advance of Trick Attack?

We weren't limited to just Slow or Ping. We easily could have had both ping-compensation and almost wholly kept our old speed. So why the sudden and unnecessary change to the playstyle?

I'm speculating here, but maybe it's because players consistently complained about how NIN had to "work harder but had less damage to show for it"?
SE probably assumed that instead of just fixing the ping issue, they'd reduce NIN's APM. Doing so (alongside the TA fix) would allow for some substantial potency buffs, and suddenly players wouldn't be "working harder for less" anymore.

Seems like another "Monkey's Paw" situation, I think.