Decoupled processing as I have seen it for years is a method to discover what you can and can not do with a mold. As Rick correctly points out your going to be in trouble molding lids with it BUT you will know WHY you can't mold them like that.
When you design a DC2 process and find your fill time is kind of high, you plot the RV curve and ya your fill time has you in a bad place of the curve you know you need to change something right? Say the customer gated on a surface they don't want blush on and that means you need to be creative with the fill profile, well thats what you have to do. knowing that your process is not bullet proof due to the gate location is a big step in creating an inspection program that is aware of possible issues due to viscocity changes, so you mark up end of fill and tell the operator to watch for shorts, you weigh parts as part of inspection etc.
Decoupled processes are easier to touble shoot and fix also, think about it. You have a first stage that does one thing right, form x amount of the part by weight in x amount of time. If you make a part that weighs that much in the correct amount of time that stage of the process is fine.
Second part of the process takes the part you made in the first stage and finshes filling it, packs it out and holds it to a known weight for a defined time. If you can make a part that weighs that much in the time given your second stage of the process is ok.
So if you can look at the parts at transfer and inspect them say to yourself 'yes these parts are the same as test parts at transfer" and you can look at your packed parts aqnd say they weigh the same and where cooled at the same rate as the sample test parts THEN you say to yourself, machine and process is ok in must be something else.