Now someone needs to rank ACFs.
it should probably be done in the "+/-" format, in relation to the class feature it is replacing.
if it is done in the "1-5" format, then each ACF should be judged based on it's effect on the respective class, as opposed to in relation to other classes' ACFs.
How about
-3: bad enough to lower the tier of the class.
-2: Strictly worse than the default Never take this unless it gets you qualifications
-1: Worse than default, but may work for some builds
+0: About even, may varry depending on campaign
+1: Better than default, but there are still reasons to take the default
+2: Strictly better than default, always take this if you don't need the class feature
+3: Enough to change the tier of the class upward or something for nothing.