Hmmm... I pointed out that in John 15:1-8, Jesus was telling his disciples to be saved, which he described as "abiding in me." He was telling them this because they would, after his atonement on Calvary, have to trust in his sacrifice for their sins, just as anyone after the cross had to do in order to be saved. It seemed to me, though, that you were suggesting that the Twelve (or, rather, the eleven) were saved prior to Christ's atoning sacrifice. Did I mistake what you were saying?
I see the term "covenant" used far more than "dispensation" in Scripture. There's the Abrahamic covenant (Ge. 15:18; 17:9-10), the Noaic covenant (Ge. 6:18; 9:8) , the Mosaic covenant (Ex. 34:10, 27) the Davidic covenant (2 Sam. 23:1-5), the new covenant (He. 10:19-22; Mk. 14:24; 2 Co. 3:6, etc.) but I don't see God, in Scripture, defining His dealings with humanity in terms of dispensations. The apostle Paul is the only one in Scripture who uses "dispensation," and that only four times. As far as I'm aware, the term never appears in the OT. And, until Darby, his dispensational interpretive lens through which to understand Scripture didn't exist. So, I don't find myself particularly interested in Dispensationlism.
Not only is Steve an extremely knowledgeable and thoughtful man of God, but he has some really excellent counters to Dispensational Theology. He doesn't foam at the mouth about his problems with Dispensationalism, though, as the dispensationalists do with his non-dispensationalism, but very calmly, reasonably and biblically dismantles Dispensationalism. If you're a seeker of Truth, not just a doctrinal partisan, you'd do well to listen to what Steve has to say concerning Dispensationalism.
Often, Christians will simply make an assertion about God's word, about what it says, and assume (I guess) that, simply by making the assertion assertively, they've established the accuracy and veracity of their assertion. But an assertion is just an assertion. You seemed to me to be doing this sort of thing, offering an assertion without justifying argument. Did you think you'd well-anchored your assertion to such an argument?