I really think there's way more doomsaying in this thread than their should be. DST is a fine licensee and there's plenty more products both ships and otherwise that they could produce for the market that they cater too. We know they have a bit of a protracted development schedule, and we're at the point we are every few years where the forum starts to whine that the latest ship isn't ready yet; the good news is that relatively soon we'll all be drooling over the latest ship and begging for more. Voyager, the Defiant, and the Enterprise–C are all high up on my Federation ship list, and there are loads of alien designs to work with too, so I'm still in favor of DST controlling the toy license. Heck, we just started to get TNG Phaser announcements not too long ago, and I'm sure we'll be seeing more of those if they sell the way the TOS Phasers did. I'm still crossing my fingers for 24th century tricorders too.
As for the "disjointed merchandising," it's absolutely and entirely the result of "Old" Viacom splitting itself into two separate entities. (And needlessly so given that it was done to keep Les Moonves and Tom Freston from killing each other, and Freston left shortly after the split.) The problem was that every license had to be renegotiated for new products, and some licensees might have been preferred over others depending on who was in charge at which company. Abrams idea of trying to ignore the Prime Universe was never going to fly, and he lost the chance at a Trek TV series when he made it a conditoin of producing said series for CBS, but originally the idea was to have that "corporate synergy" of '90s Trek, and to have new material on big and small screens. When Abrams took his ball (err... red matter) and went home though, that went out the window and left Viacom/Paramount marketing to a different audience than CBS, and only further fractured the license with Paramount licensing on a per–movie basis and CBS licensing (at least at the time,) on a basis of the entirety of the Prime Universe, supposedly "with the option to extend to new material," although that might have changed.
As far as the "reunification" of CBS and Paramount goes, I know this is probably better suited for a separate thread, but I wouldn't count on it happening anytime soon. Paramount appears to have garnered some foreign investments from China, and CBS doesn't appear to interested in scooping them up. A few months ago I would have been far more optimistic about such a possibility though given that CBS doesn't have a movie studio and Paramount doesn't have a TV presence, making such a merger seem like a no–brainer. Of course, with Viacom in perpetual chaos, it's entirely possible that CBS doesn't want in on the drama they've gotten a free pass out of, and some of Viacom's board members are the ones opposing such a seemingly obvious solution to the problems plaguing Paramount. I wouldn't say it's impossible, but for the time being, it's increasingly implausible.