That's kind of within what I would've expected, it's just better to be sure than sorry. Things are so subjective, personally I'd consider most of the stuff in Tier 2 to be more along the lines of "Nasty" rather than "Hardcore", since some(/lots) of your content already falls within what would - subjectively - be considered hardcore.
Personally I'm okay with most things, although not everything is a preference. I'm "fine" with lot of "nasty" stuff like smegma and other bodily fluids - including blood without gore. It's still overall a negative factor towards my opinion, but unless something focuses pretty much solely on it then it's not going to stop me from enjoying an otherwise great piece of content. In terms of nastiness my line tends to go around what you consider "weird".
So for the most part, I'm fine with stuff being "nasty", is the point, I have more stuff within niches and other fetishes that are no-go's for me instead; I can't deal with insects at all, and certain monsters are also no-go's. Generally anything that is somewhat humanoid and doesn't have a too "weird" penis is fine. Tentacles, machines/tools and certain animals aren't outright "nope's" for me, but I don't get off from seeing them interact with the women. They would be effectively neutral, if it wasn't for the fact that their presence will detract attention from anything else that would be happening instead.. so in the end they end up being a mild negative.
Then there's more minor irks/preferences; if I get the choice, I always prefer a happy/light setting rather than a depressing/dark one, but with a few exceptions, it's not going to really put me off from anything. I do have some PTSD regarding NTR, but you'd have to be an incredible NTR writer to start touching my triggers, even more so if you're not including text.. in that case it's largely up to your ability to create the "NTR atmosphere" as well as how well you can intricately tell a story without words - and even then it'd still need to actually focus on the NTR aspect.
What I'm saying is that you don't need to worry about it :P
Anyway, sorry for the infodump. I'm autistic and tend to rant about stuff I'm passionate about. If not today I'll probably sign up within a few days - I should be easy to recognize both due to my name and avatar.