I use aluminums exclusively, and have fletched my own shafts for 20+ years. I always soak them a good while in acetone, and wipe them with a paper towel (and listen for the squeak) before fletching. I then dip them in clear fletch-laq, let it dry, then fletch with Fletch-tite. My feathers never, ever fall off. I pull arrows all the way through foam bales and plastic bottles and stuff, and they don't pull loose. They get ripped and worn, but I have to scrape those quills off with a knife and soak in acetone to completely remove them when the time comes to re-fletch. I literally cannot remember the last time I had a feather just fall off.
I have not used the Fletch-tite platinum yet, and still have 3-4 tubes of the original stuff that I haven't opened yet. (The glue is aging and gelling, so I'l be switching to Platinum soon.)
I have no reason to believe (yet) that Platinum is so drastically different. My father ran an archery shop and fletched thousands of arrows himself, and did them all the same way I described above. He did not have problems with feathers falling off either.