Oh yes it will certainly be before then! I’m just working on polishing up a few aspects, I don’t want to give a hard date since it always seems to take me a couple extra days, but very soon! 
The light shining through is going to have to be faked right now using a Godray mesh/material, I have one set up and it works fairly well. I am trying to figure out the best solution to spawning these in game though, having them there all the time is just not going to work performance wise. It could be done in a blueprint, but it seems a bit overkill. One idea is to make them into particles that spawn inside a radius around the player when they enter the water. That should be doable, keep their lifetime up high enough and sort of fade in and out. I can easily output a parameter from the particle system that takes in the suns position so they are angled properly. Then we need the caustic on the floor as well, I have the material for that done, just need to work out a system of applying it as a light function only while underwater.
I’m trying to consolidate all of these ideas, so I decided to set up a Trello board. There are a few things missing, it’s not quite done, but if you guys want to vote which features you want feel free! I will try and keep it up to date and add in more notes/cards as new ideas come in.
So, Trello board for project can be found here:
If you have a you want included but is not yet listed, please post your idea here and I will add it in.
Thanks guys! 