Like the name says, it would be nice if weakened zombies were an option in d_init.tx, and not a rule. Are modded zombies also weak? If so, that should also be an option. Do the vanilla zombies have [CE_AD:CANNOT_JUMP] or something like that? If not, and all zombies, modded or not, cannot jump, please change that by adding the appropriate [CE_ADD] and [CE_REMOVE] so not all modded zombies are that weak.
Because some people can't read without capitalization and punctuation.
Comments regarding the suggestion:
This looks like a few suggestions:
1. Make "hard zombies" a d_init.txt option.
No. If it exists, it should be part of worldgen, not part of the init.txt's. Those are for meta-game stuff, like resolution; graphics pack stuff, like tree tiles; and caps and such that are kind of hacky and you might want to change during gameplay.
Anything that affects a creature directly should be in advanced worldgen.
2. Make it so that zombies can jump by default.
No. Just no. They're a mass of flesh that has been given the will to walk, or has had a hostile being's soul placed within it, or something like that. No way can something THAT CAN'T EVEN DODGE have the capacity to balance, bend its knees, and propel itself forward. I find it preposterous that they even climb. There is a very very very very long thread on whether zombies should be OP. Toady's verdict? Nerf now.
3. Add a creature variation for jumping capability.
I don't think this already exists, and so this is a good idea. Should also have a copied tag for climbing.
I'm pretty sure that zombies can be modded, though I could be wrong.