Very true. So that equally applies to prayers that involve saints, the initial controversy we discussed.
I thought you were morphing it into a predestination/free will thing. :) But it certainly does make a difference whether we are including (departed) saints in the discussion. The Bible speaks often of living humans praying for other living humans. Therefore, we know that is good. However, we have great dispute as to whether the Bible supports departed saints receiving and passing along prayers made by humans on earth. I don't think your verses from Rev. 5 and 8 support that.
First, the issue is, where do the Catholics find a biblical justification for the veneration of saints. The question is not whether interpretations of these verses exist that are not Catohlic.
Second, for your interpretation to even make sense you have to explain why these prayers (Apoc 5 and 8) are delivered to God by saints at the Judgement day if they are not connected to the people being judged.