I'm not much of a serious sisters player. I'm the only one I know of in person and I've got a whole almost 1,000 points of un-optimized metal sisters that I will periodically play. So I'm not coming in to this discussion as an experienced or even very dedicated sisters player.
As a casual player looking at the beta codex, it's boring. I also understand that this is a beta codex and doesn't include the no doubt 2-5 new units or models that the final version will. This however doesn't make me want to run out and buy another 1,000 points of metal (or plastic) sisters in anticipation of the final copy.
The index AoF were strong, I'd even say they could stand some toning down, but they made up for the fact that the army was overall very lacklustre in terms of movement and offensive capability and in identity.
If someone were to theoretically take away Acts of Faith entirely, the sisters look largely like weaker space marines with far fewer unit and weapon choices. The beta acts read not like a special army wide feature (see imperial guard orders or power from pain or even psychic powers) but rather like the sisters traded 2/3rds of the space marines equipment for access to a set of extra stratagems.
Also Ebon Chalice seems far too much like an auto-include if a player is using AoF to any significant degree. I've mentioned it elsewhere but it's similar to getting a free ten points on every simulacrum eligible unit while giving a simulacrum to units that can't take them.
Maybe I can't see the potential and the power with this new codex because of my lack of experience with the army. If this beta codex reflects what will likely be in the final product (and that's accounting for 2-5 new units or models) then I don't know how enthusiastic players will be to adopt it.