Sad thing it has to be like that. The pre funded coins had some sort of credibility. Now you can not know for sure if those coins are safe...
AFAIK the coins were never pre-funded. The funds were always added after purchasers received their coins. This is no different; it's just you funding them upon receipt instead of Mike funding them.
To be fair, there's a difference between an unfunded coin that I intend to fund with the original buyer's funds on hand but just haven't done so yet, and an unfunded coin that I explicitly have no intention to fund.
All else equal, one's likely to be considered worth 1BTC more than the other.
There are some advantages to the latter. For example, I don't have to force users to use expensive shipping options to keep a grip on unfunded coins making it into the wild. If self-fund coins get lost, the loss is limited to the physical coins that got lost, and not any BTC.