I was revised from sleeve to RNY yesterday. Today I can do way more than sip water, Propel, and crystal light. Am I correct in assuming that liquids are going straight through like a slider and that I have nothing to worry about other than liquid, protein, and vitamins?

You are correct liquids pass way faster - For example i drink a full Gatoraide every day for hydration and electrolytes and it only takes me about a hour to do! This is the big bottle of GA also

Correct (plus you have don't need to worry about dehydration)

Yes - I also had the sleeve to rny. With the sleeve all I could do was sip. Now, I can guzzle water!