I find that an utterly bizarre list of reasons to not want to approach a game. Although I do agree on your assessment of the silly fantasy romp (goblin shoving explosive in a dinosaur's rectum), but I cannot be sure if that is (1) a fault of the system or (2) the adventure design by the DM or (3) player choices for their character - my guess is 2 or 3. If they had fun though is all that matters ofc. To each their own.
The thing is, I read a lot of games. I've run a lot of games. The fact that you find a list of why bizarre? Not my problem. That you don't understand my reasoning for them? More a problem.
1) I've often found 4-att systems conflating things I don't like conflated.
2) I've found that I don't like the emergent playstyle of systems usising broad professions; it often leads to a lot of negotiation in play. Wastes time and effort.
3) a separate social stat from the logical/mathematical attribute is something that helps me not chafe at the system. (Palladium, which has a social stat, doesn't ever USE it, and that was a source of frustration, as well) Putting the social tasks across two, in my life and educational experience independently qualifiable atts is both a barrier to some of my players, and a problem for me with verisimilitude.
4) JD was wrong on 4 - wrong element of D&D advancement picked. I don't care for flat, I'm not picky about speed. I'm also not a fan of character levels... I consider 5E a little too flat in some ways, and not flat enough in others (too many class features!), but better by far than 3.X
No one of those is a dead-flat fail. 3 of them? no longer worth my time and money barring some unqiue and interesting element. The thread provided the elements I'm interested in knowing.
I'm in no way implying others shouldn't like it. That it has features I'd find annoying? Good to know from my POV. That it has a boon/bane system? Interesting. Interesting enough that I appreciate the explanation. The explanation was different than other games labelling subsystems with the same name.
OP wanted to know why it has such a limited audience...
In my case, it hadn't been pushed in a way that made it look like more than another OSR-ish heartbreaker.
Finding out more, I noted (and a lot of the thread seems to be trying to come to grips with) my reasons why, now that it's on my radar, it's on my avoid list. Simply put, those are elements I don't like in other games and the combination's killed what little interest the thread raised in reading the game. I am enjoying reading about it, even as I'm becoming less interested in reading/running it. I may be particularly unusual in that way. I'm weird. In many ways.