I'm glad you're finding success, especially with the litter box. That can be an easy or tricky thing to sort out.
Honestly with the coffee table you might have to cut your losses there or get a replacement. It can be tricky to keep cats away from low hanging fruit like that, especially if it's in a space that they like to play in or travel through because they want to try different routes out. If it's a matter of preserving the table and things like foil don't keep them off, might need to move it somewhere else altogether :\
Strings and laser pointers are fine but I still think having some other, larger toys they can engage with themselves and feel and kick and bite will help out a lot. Laser points are good for distracting and getting them to run around but ultimately they are going to want a real thing. They will really love it. I got a brown mouse plushie for like 5 bucks at Petco and Mulder had that from day 1 and he carried it around with him everywhere. We lost it a couple years ago during some house renovation work but I was able to find more of them and he loves these ones almost as much lol. I guess your fear that they feel they are getting play time in reward for biting your feet isn't unfounded but in my somewhat limited experience with a handful of cats, they see it more as "I'm supposed to play with this, not that". I know all cats are different though so maybe they will see it your way >_> It's a risk worth taking imo.
As far as hunting goes that shouldn't be *too* big of a concern for littler cats, unless fur is flying or someone is yowling and the other one isn't stopping. And they are neutered right?
They look so cute in that picture, I am glad you got them!! Keep up the good work!
I appreciate the encouragement Hexen! Definitely getting progress on the litter box, no outside the box pooping since Saturday :)
Now I'm getting more concerned about the biting/lack of obeying redirection.. I know they are only three months but it seems they have been REALLY conditioned to do what they want... Trying to eat is a losing battle as they just keep jumping up on the sofa and trying to stick their nose in the food (despite having plenty of their own food) despite me moving them more than ten times with a stern voice.