Well Changer, you'll be happy to know that the Collier character isn't going to be ruined by turning him into one of the Marked. Thank goodness too, as I agree with your assessment of the character and really do feel he is one of the best realized fictional characters on TV today.
Nightcrow, sorry you can't stand the religious angle the show is taking, but it's not bad writing like you say. It's actually brilliant and I am impressed that anyone writing for American TV would be so frank about religion's real purpose in the human space; that being the purpose of creating a self replicating meme designed to spread an idea that at some point, very few or no one will question, but just except as the truth. This is not the first time such and event has transpired in human history and would not be the last. For example, historically, the spread of Islam, Christianity and Judaism has nothing to do with getting people to a perfect afterlife and more to do with one culture waging a war of ideologies over another - or every other as is the inherent mandate of every major Western religion.
The 4400 has made it clear on more than one occasion, that Jordan Collier himself does not believe in all the religiousy pyscho-babble that he is spewing, but like powerful people before him, he understands the nature of the human mind and understands that when you engage people on a level of faith, any real critical thought pretty much goes out the window and you can spread a meme (in this case, that Promicin is God's gift of redemption to an errant humanity), extremely quickly, efficiently and virulently. The same holds true for patriotic/nationalistic (Nazi-ism) thinking, which is just another form of religious thinking. Just like religious thought, it is primarily engaged to remove any critical thoughts from the minds of the believers that go against the agenda of the meme it is attempting to spread. This is why in 2003, it was so easy to just simply wave a flag or evoke the name of God, and suddenly you have half the American populace supporting a preemptive war on another country, despite the fact that all the evidence pointed in the opposite direction. It was not something that was too hard to do, and is a dirty trick that men of power have been using over the masses, dating back before the beginning of recorded history.
So to not include this sort of "meme-ing" technique in the script of a show that is essentially a telling of how "one man started a movement that changed the world and all of humanity for the better", not including this angle is actually the dumb option. To anyone who bothers to study history or even the human psyche, it is very realistic and appropriate, and if Jordan Collier was ever going to have any degree of success at spreading a pro-Promicin ideology in the context of the show (for better or worse), something of this nature was going to have to be evoked at some point or another; there simply was no logical way around it. Especially not when Collier was beset on all sides by a society and a government who was dead set in opposition (see season three) to allowing anyone else outside of themselves any measure of real power.