Well, not directly
Loch Lomond is a pretty firmly established distillery and an increasingly larger player in the game. I have OB bottlings of Loch Lomond, Inchmurrin, and Old Rosdhu, and whilst they're pleasantly drinkable malts, there's certainly nothing special about them.
Given the distillery's status, I would have thought that it would be very easy for them to launch an OB of Croftengea if they felt it was any good.
So I'm only surmising
that the lack of an OB suggests not much confidence in the product from the owners themselves. Admittedly, Croftengea is made purely for blending anyway, so it's not like they're setting out to make a marketable single malt to begin with.
However, it could also be that the SMWS has an enormous demand to supply peated malts to its members, and they'll happily source drinkable peated whisky from wherever they can get it!
But, as I said initially, I haven't tasted the beast, so my comments should be taken accordingly!