It would be nice to have some polls, I might consider making a new thread if I get into it seriously.
I like the idea of elemental weapons, but last time I checked weapons could only have one sort of damage. So it's either element or physical. I'll check into it though, been a long time since I made my last walk in the world of mods.
Rajang and Zinogre sound good. More any-biome land creatures goes a long way. I'll also work on Gobul as Iados' notes mention it and water is one of those things that's part of everyday fortress life.
Yeah, I've noticed that bullfangos get a lot of spotlight. (Number of quests to hunt them should decrease now though, as more monsters appear in normal gameplay). I'll see what I can do to tweak them. You have to remember that they're terribly agressive though, like almost everything in MH. I'll do a few tests to see what I can do to keep them agressive but more annoying than actually dangerous.
Btw, I've only been playing since Tri (but I also have Tri U), so my knowledge of older monsters is a bit limited, but some delving on the wiki and watching videos should compensate.
My largest dilemma right now is monster lifespan. I saw a lagiacrus die after a mere 69 years, even though I was pretty sure I increased that. I'm not quite sure how long they should live. A couple hundred years seems best (well, except for the smaller monsters and playables), but I can't quite decide on the exact time.
Current thoughts (yes, I love input from ppl):
Felynes/Melynxes: Roughly 50-70 years. [Range of maxage]
Shakalakas: Problematic, but they are related to Felynes and Melynxes, so I'd give them about 10 years less. 40-60.
Smaller monsters (bird wyverns, jaggi-calibre): 30-50 years.
Semimegabeast-level large monsters: Definitely 3 digits, but should be near the human lifespan as well... I want them to live longer so that they get long kill lists and actually should need hunters, not just die out on their own. But live too long and it feels too irrealistic.
Megabeasts-level monsters: Probably 1000+ to no death by age. Though in most worlds it would be unlikely, but finding the story of a 1000-year old Raviente finally passing away after terrorising the world for centures would be nice.
The non-SMB level large monsters would be between small monster and large monster lifespan, but it would vary depending on if it is a well-developped small monster (i.e.: Congalala) or a unique species (i.e.: Qurupeco)
I wish the MH lore actually had some more references to monster age. We know that the elder dragons are usually considered unbelievably old and dangerous. The Lagiacrus has to be a few decades old too, but that's not much to go on...