No. handling a franchise is much more than just making games. DQ is handled extremely poorly by SE. DQX, an MMORPG was released on Wii in 2012, just a month before WiiU launch. That was a huge mistake. It killed the momentum of the series. Core DQ fans in Japan might enjoy it, but as others have pointed out, DQ is a very casual franchise that relies on a much broader audience. The MMO nature blocked all those people from entering the franchise. Not to mention it never came to the west so what little fanbase DQVIII and IX cultivated here was simply abandoned. For the greater audience, there's an almost a decade of vacuum for Dragon Quest, and that definitely hurts the relevance of the franchise.
DQXI is another example of brand mismanagement. It started out as a PS4 game, yet they have to bring it to 3DS because SE vastly overestimated their ability to "reignite the console game market" in Japan. What we got here is a great console DQ on a pathetically small install base, probably the smallest a mainline DQ has ever been on, and a great portable DQ on an outdated system whose successor is already out. Not an ideal situation.