As a psychiatrist, I'm just going to tip my toe into this conversation:
I have not read the entire list. I read a good chunk of it. Almost everything on it is -not- stuff I see among my colleagues, and appears to be how psych stuff is presented /in popular media/ rather than in the profession. Which is fine if one targets this for the science media/science communication types, but it seems very odd to apparently have a target audience of psych professionals. So of course there's a list of 'inaccurate and misleading' terms - you can't simplify something without losing /something/ of its complexity, but it still needs to be communicated.
The other thing to point out is that some of their criticisms are just ... well, outsiders commenting on things they don't know about. It's a team of academic psychologists. Psych PhDs generally don't do frontline stuff - they do targeted 1-on-1 therapy, or group therapy, but they tend to parachute in and out, they're not doing the days-long care-and-feeding of these patients where some of the terminology they're criticizing comes from. For instance, they take issue with the use of splitting, but ... clearly don't work on the unit. Splitting isn't just about wanting to avoid the thoughts of your loved ones being flawed beings; it's about the emotional hyper-sensitivity of a BPD patient resulting in them condemning as awful anyone that is less than entirely positively oriented towards them, because they can't take any negative interaction (see paragraph 1 about "I'm oversimplifying shit to communicate to people outside my profession", so don't come at me to pick nits. I know it's simplified-into-wrongness.) The result is that when they a unit staffer enforces boundaries, they're instantly terrible; as opposed to that "other" staffer that didn't have to enforce boundaries with them, who is wonderful, can I talk to them now please instead of you, you awful monster? And so the psychodynamic 'splitting' leads very quickly into 'pitting staff against each other'. It's not a mis-use of the term, it's a specific manifestation of the term that you deal with on the unit. Which the authors would know, if they were frontline workers rather than consulting therapists.
And the section on pleonasms is just nit picking for the sake of nitpicking.
This article doesn't do anything in the way of making psychology nor psychiatry more precise. This article is a lot of nit picking, in ways that look valid externally but would have anyone familiar with these things wondering why this was worth writing.