There is no question about some products changing when formulated by someone other than the original producer. It can be expected. There are some variables or some details that can't be duplicated 100% by the new producer. Not to their fault. It is just how things can turn out.
You would hope that things would continue as you knew them to be, however this is not always the case.
Could be that a key ingredient may have changed or not available now, or a specific product made in house cannot be duplicated exactly the same. It happens.
There is a familiarity that the original producer has with everything that they have formulated. It is well beyond just an ingredient list.
It is the steps and order in which you are blending those ingredients and how long they must age that can make the end product what it is or should be.
Lure and bait making can be very detailed with some products. Each batch is a new beginning. Organic products, and some ingredients can change a little from one run to another.
Example:
A batch of glands aged a bit differently due to temps or another environmental condition. A base color varied a bit or an essential ingredient is not quite the same in odor now. Lots of variables that we must deal with at times more than we would like.
So, don't be too critical of who is making another's products without knowing the facts. Give them a chance to iron things out if that is possible.
Mike is a seasoned formulator, and I am sure he can do as good a job as any in reproducing a product line if all the original ingredients are still available to use.
If there was very little, to no hands-on training from the original producer in making each product therein lies a big challenge. The chances of a mirrored duplication of those products could be difficult to say the least. IMO