Not at all. You gain the "Aquire Class Feature" ability three times over the course of the Illithid Savant PrC. Each time you get to aquire ONE class feature. If you use it to gain Aquire Class Feature, you just gained back exactly what you used. No different than casting an 8th level spell that lets you regain an 8th level spell slot.
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Try reading the rules and not the table before closing the book.
B. The way Acquire Class Feature is written, Bloodline 3 / Illithid Savant 7 gains three Class Features though Acquire Class Feature.
I understand what snakeman is saying. I believe I understand what soro is saying. Since soro's is the more powered up version, his to me atleast has the burden of proof. Unfair, yes but c'est la vie.
**pulls out copy of SS**
What I see is "at 7th and again at 10th level, the IS can gain another class feature from a consumed brain."
Keep in mind bloodlines only advance formulaic things. Since the wording mentions no formula it is a no-go for BL, though granted it is on the cusp like SA progressions.
That aside I assume you are saying that it is only one ability. When eating a brain and trying to use the ability it simply checks for a) availability (an IS10 can't permanently gain more than 3 class features assuming they are all non-IS brains) and then checks for b) the IS level. Part b) is interesting and appears to be RAW. However if an IS3 eat an IS10, the IS3 still doesn't have to prerequisite levels for the 2nd and 3rd uses.
One may argue that he needn't have them. The only way I can see this is if the ability 'changes' to whatever is absorbed. Is this unreasonable and does anyone think they can prove this part?
Since no rule states that Acquire Class Feature stacks with itself, it doesn't. I guess if you ate someone who had the more advanced Acquire Class Feature you'd get that, but that would just save you levels in the class... you couldn't keep going up from there.
Makes sense. NGDBSS the example there is consistent with jaronk's interpretation because the example hasn't eaten any brains for more Acquire Class Features.
tldr; show why IS3 eating IS7 gets its two unused ACF chances
edit: ignore the BL part, soro realized the mistake.
Eldritch Lord that would be what is known as an 'abusive' interpretation. It is possible, but abuses the 'one class feature' 'additional class feature' and 'a brain' clear RAI there