I liked Trip, but honestly I would've been okay with either Trip or Mack dying. Bob gave a finger wag to a show killing off BOTH OF IT'S BLACK CHARACTERS OH NOES (eyeroll) but what's been FAR more criminal is how bland and uninteresting they both were this season.
Mack is supposed to be the mechanic... or something, right? People keep mentioning he has a garage. When the hell have we seen him actually do stuff in said garage? For most of this season all he's been around for is being Fitz's buddy. When he's not Fitz's buddy, he's playing video games or drinking beer or both. Only two episodes ago did the show give him the least bit of an extra dimension by implicating him with some conspiracy with Bobbi, but that's it.
Tripp was great at the end of the first season, but he hasn't been given a chance to shine at all this season. Someone above mentioned that his actor has a role on another TV show that he's probably leaving this one for. So, my theory is that they originally introduced him in Season 1 to replace Ward in this season, only for the actor to want out to focus on this other show. So they introduced Hunter to be the replacement for both Ward and Trip, and gave him most of Trip's moments for the season while Trip has been a bit of a hanger-on until they got to the mid-season finale where they HAD to kill someone. Makes it all understandable, but I still dislike it, as I liked Trip better than either Ward or Hunter.
As for Whitehall, I too don't think he's dead, but I think it for a reason I haven't seen on here yet: body double. Cal is a medical doctor, and even when mad I would think he'd be able to tell if someone was dead, especially because I think we saw him checking. But when Fake May shows up and goes over the body, the last few frames I think we see her have an expression of surprise. I take that to mean that she found some sign, or a lack of one, that identified this Whitehall as a fake. Her grabbing Ward is a fake-out to bring him to Whitehall for brainwashing, as Whitehall already stated that was his intention for Ward.