Its true, minced up meats don't do anything for their teeth, but nutritionally they are fine, its just important to make sure you include both some whole bones i.e. chicken wings, and larger chunks of meat that encourage them to use their jaws and teeth.

Catlover, the necessary extras you talk about, like taurine are already there in abundance in raw meat, especially muscle meat like thighs and particularly heart. However if feeding raw thats been frozen its probably a good idea to add extra taurine as any processing/freezing can lower taurine content, although its still likely to have much more than is even added to commercial cat food because its well known that pet food manufacturers added only the minimum required, not the optimum.

Oh, and I also mix raw and commercial food - commercial in the morning (usually Hi Life pouches) and raw in the evening, but some days it will be raw both meals.