I just don’t get it, in the Mercenaries Sourcebook it’s presented as a cheaper alternative to some other augmentations, but in practice it’s not all that affordable. Imagine you want to get Sixth Sense, a fairly high end combat aug. If you get it the traditional way it’s a Restriction 2 Cost 11+1CD T1 purchase, plus whatever you want to spend on a superior surgeon. Pretty hefty expense for sure, but since it’s a full body Silk augmentation you still have 2 full body silk slots available. If you want to get the same through Metachemistry you first need to go through the Metachemistry Procedure, Restriction 1 (assuming you’re military) Cost 9+1CD T1, followed by the Metachemistry version of Sixth Sense, Restriction 2 Cost 8+1CD T2. All in all, the Metachemistry variant seems more expensive than the traditional Silk based alternative, and it leaves way less room for further augmentation.
Another issue I think with Metachemistry is that the base procedure is a full body bioware (which means you could at most get either another bioware or silk full body augmentation), with all metachemistry augs being full body cybernetics. Rules wise this would be an impossible combination as far as I understand augmentation rules. Not only this, but some augmentations that would otherwise be Implant or Limb augmentations are instead full body in their Metachemistry versions. Did I read this wrong? Maybe all Metachemistry augs are treated as Implants if you’ve gone through the procedure?
Honestly, I don’t understand what they were trying to do here and I’d love someone helping me make sense of this.