I don't think so, unless there's something about almond milk that I don't know. Adding water to Metamucil doesn't defeat the purpose.
No effect. In fact, high fluid intake will help with any digestive process. Eat and drink up!
How long ago did you start? When I first started plant based, which is extremely high in fiber, I was going a lot, but then it leveled out to once a day. Sometimes it takes your gut a little time to adjust, but high fiber diets are incredibly good for you.