So we finally loaded up modpack v2.3.3 on our server and tried out the new FTB Utilities chunk loading feature.
Unfortunately, it seems to have some issues. I can't be certain tho because I'm a game player, not a mod designer. But it APPEARS as if my Recyclers/Cyclic Assembler kept working thru the night while I slept to make Scrap Boxes. The count increased by 2000 stacks, so that was clearly working. However, in my Auto-Spawner, the Witches did not work at all, because my Glowstone count (which was zero when I logged off) is only 51 pieces which means the Auto-Spawner wasn't working at all (or else the MFR Grinders weren't working, but I believe it was the Spawner).
So why would SOME machines keep working, and others didn't work while chunk loaded? Only the mod developer can answer that one I guess...
As of now, I'm going back to my Railcraft World Anchor to chunk load my base. At least I know that works properly. With the FTB Utils, I can't be sure it is working properly yet. It appears as if it might not be.