I will have a go at some of your questions -
mince from butchers. There is nutritional value from this as it is raw. When you cook it the enzyme change so destroy some of the natural vits, or rather reduce. However you don't know the ages of the meat they are puttig in to it. You also don't kow what they are putting into it but i do personnaly like to think its a good way of introducing kidney and heart as its a diluted version. Some may disagree with this.
chicken - my dogs like wings. They have to chew them up. They suit them very well and we did a lot of the transition phase on them.
Taste - well taste is a factor, it tastes much better then dry wag. even if it appears to only last seconds. Think the texture might sit nicely in tum too. My dogs get much more excited about what they are having now. Its nice to have a varied flavour and texture rather than the same thing everyday.
I hope this answers a few questions. There will be people that disagree with some things i have written but this suits my dogs. Their breathe is also almost smell-free. And i don't feed lots of bones because it causes huge bad feelings all night even if fed seperately but i would do if i just had one dog.