As has been mentioned on the silhouette forum, this decision alienated a large population of TC Contender shooters. Namely, the IHMSA folks, who are restricted to 10" factory barrels. NRA made a change to allow 12" barrels because of this business decision, but IHMSA has not followed suit.
Since TC has a link to the IHMSA on their own web site, this seems like a strange decision. It sounds to me like they are targeting the hunting market, which have really bought into the Encore line. It's a shame they've abandoned one of their longtime support bases though.