Ok the biggest issue I am seeing is extra, and somewhat unnecessary GRIND.  Whilst it is a great that the effects of each mutagen/antigen is carried on through 100% when mixing  -in order to make a fully gened kavat or kubrow takes a minimum of four breedings  (+ an extra if you then want prints/to use the fully gened pet) so 50 son tokens, not to mention you have to incubate using cores, eggs/codes, ( multiply that with 6 breed types of each infested pet) then that's an awful lot of work a