The point is she should have waited one more day to release the 1.4.6.
Choice 1 - She releases today and you have a day to play around with the new toys in a test world, but only by itself. (we still get RedPower2 today, but can't interface it with other mods yet)
Choice 2 - She waits until tomorrow, you don't get an extra day to play with her new toys, but when you do get them you can play with them AND the rest of the FTB mods. (we have to wait even longer for RedPower2)
Choice 3 - She uploads 1.4.5 today, giving you a chance to play (for one day) with RedPower2 in your current FTB worlds, then she releases the 1.4.6 update tomorrow along with the rest of the mods, and you (possibly) have to start all over again, depending on the choices Slowpoke & the gang make in regards to FTB (Twice the work for Elo, and possible tease/waste of time for us if we have to restart our worlds/servers)
Choice 4 - She uploads them both at the same time (today), and everyone is happy one day earlier than you are suggesting. (Twice the work for Elo, 1.4.5 will probably not need to be on her servers for more than one day before it's forgotten & not downloaded anymore)
She knows what version all the other mods are at. She is on the same server as all the other mod makers.
She also knows that it won't take most/all of the mod makers more than a few hours to update their mods to 1.4.6. She's been busting her ass with her real job and coding RedPower2 like crazy since 1.3...she could use a break, and everyone is bitching about her not doing double work so we can play with RedPower2 in FTB one day early.....
Should have released a 1.4.5 and let us test stuff out while all other mods are getting done.
Was a nice thing for her to do, just did it the wrong way was all.
Most people that use FTB are familiar enough with the mods that they can predict how the new RedPower2 machines will work in their builds. The important thing is to have time learning the machines themselves. You can do that in a 1.4.6 test world just as easily as you can in an existing 1.4.5 world. Use this time she's given you to try out her new machines and toys...see how they work, hands-on...familiarize yourselves with the new recipes...test out some sortron programs...use RedPower2.
Give Elo a break. She chose choice 1. It was the easiest thing for her to do, while giving the community the most benefit (not wasting time compiling & uploading a version that would only be used for a day). Slowpoke has already said most, if not all, of the mods will be updated very quickly...I'm sure Elo knows this. If something unexpected happens and one/some of the FTB mods can't be updated as quickly as expected, THEN she will take the extra time to update 1.4.5.
Before stringing her up for the choices she's made, take a minute to look at things from her point of view and try to come up with a reason she might have made the decision she has. It doesn't take much to fine a reasonable.....reason.....she made the decision.