The Thames is radioactive as fuck in this mod, there is a flooded area not long after the Fish people and stepping in the water gives you 347+ rads a second.
Radiation isn't what makes big scary mutated animals, it's the trace amounts of FEV in the air that linger on in the atmosphere after the nuking of West Tek facility in California aka The Glow from Fallout 1. The FEV, along with radiation, turned various critters big and mean. Radiation isn't magic pixie dust that turns people into fish no matter how much Bethesda or the COLON team wants it to be, so that's why I am asking. This may be my biggest turn off if it's not properly explained, despite all the gay shit they put in and how unfinished everything generally is.
a cult of tribals that are naked and worship a canyon
What canyon? I thought the game took place in London and the map isn't even that big, is there a Divide style set of urban ruins?
Anyways, here is some more things I found:

Obviously, take this with a grain of salt, anybody can post anything on 4chan, however...

...their site does host actual malware on it. Oh, and you are willingly giving away your Steam data if you use their downgrader.
This one is just funny to me

I guess nobody has the fence jumping loicense in London.
The game balance, from what I am reading, is heavily skewed towards melee and really shitty bolt action/pipe guns. With Fallout 4's gunplay, it's about as fun as it sounds, additionally the game is balanced around most enemies not having any armor...except then the game just throws an unedited Mirelurk from the base game at you here or there, which have 45+ armor and will tank anything your dumb british ass will have at that point. Most enemies from F4 are here, they're just reskinned, altho all the assets from base F4 and DLCs are still here as well, so you can just add them via console or mods. If you're playing the game, feel free to correct me. I am curious how viable the rest of the weapon classes are(Unarmed, Explosives, Big Guns, Energy Weapons, Automatics).