Among others, KDF players are Klinks or Klanks, spiral wave disruptors are pissbeams, the Caitian Atrox Carrier is the catbus, and the Jem'hadar Attack Ship is the bugship or Jem bug.
"Rainbow boats" or some variation thereof for a noob mistake of not making your weapon types match up, because of the resulting beams being in all colors of the rainbow. As one guy on the forums remarked on one of these who used cannons, "every time he fired it looked like a pack of Skittles exploded."
The forums use so much shorthand for builds and abilities it's practically a second language you have to learn.
The new Obilesk carrier has also been dubbed the "Obisek" carrier, noting how close it was to the well-known Reman character of the Romulan storyline.
Zachary Quinto, AKA Neo-Spock, now provides the voice for the EMH Mark VI, and will provide some narration for the tutorials.
Leonard Nimoy as the general narrator. He'll be Mr. Freakin' Spock, too. (The very first thing he says is to explain why that makes no damn sense, since the major changes he exposits happened after he left the main timeline.)
Denise Crosby returned as Natasha Yar for the 3rd Anniversary mission featuring the Enterprise-C, "Temporal Ambassador". She also reprises her role as Sela for her appearances in the Romulan storyline and Romulan-centred Featured Episode series, and is the voice congratulating a Romulan character on being promoted.
Michael Dorn is back as Worf for the Featured Episode "Sphere of Influence" and he will go back and voice his scenes in the early Klingon missions.
I Knew It: When Cryptic told fans that the "Sphere of Influence" mission was being held back, fans had assumed they were adding voices. When people took notice that Worf's model had been revamped to look like how he was in the series, but older, people figured that the reason had to do something with Michael Dorn.
Largely averted, mostly because the game's older content largely un-voiced, but since James Doohan had passed away well before production of the game started, a replacement voice had to be brought in for The Guardian of Forever, and his accent slips through quite often.
When the game does feature VO for established characters, the devs go out of their way to get the old actors back to help. Denise Crosby and Chase Masterson are good examples, and in season 8 Michael Dorn voiced Worf to much acclaim from the fanbase.
Majel Barret was ready, willing, and able to provide the voice for various combat notifications and alerts, but she has since passed on, and a replacement had to be brought in for the announcements at Prison Facility 4028 during "The 2800" episode. Her replacement manages to sound almost exactly like her though.
Screwed by the Lawyers: Cryptic is allowed to use anything from the TV shows and prime timeline films because CBS owns the licenses to them. However, the JJverse is off-limits (they were allowed to use the story details up until the Jellyfish and Narada left the prime timeline), and anything from the Star Trek Expanded Universe has to be negotiated for. Cryptic also had to negotiate to use the Guardian of Forever at the end of the "Klingon War" storyline, since the rights to that episode belong to a different copyright holder. CBS has also put at least two ships off-limits to be used or given major upgrades, the confirmed ones being the Enterprise-J from Star Trek: Enterprise's Temporal Cold War episodes and the Constitution-refit from the films.note While there is a Constitution-refit ship in the game, it's only Tier 2 and CBS refuses to allow them to make a Tier-5/Fleet variant.