While I really like the game, having to create your own generic party members (cause let's face it, who the hell are you gonna streetpass with the game?) was kinda off-putting. I actually got stuck in the game cause I tried skipping making fill-in party members.
DQ9's "create your party of generic party members" thing was a homage to DQ3 -- which was probably one of if not the most influential JRPGs ever. It's not like it was some bold new edgy thing that they pulled out of thin air for the first DS title.
But as for the streetpass thing, you wouldn't streetpass anyone with DQ9 per say -- I don't think the inn thing worked that way, instead just getting you visitors and maps, not PCs? Instead it had local wireless coop like Monster Hunter.
The local coop thing is why I couldn't get why people were even a little shocked that DQ10 was a MMORPG. DQ9 basically could be played as a local wireless MMORPG in it's own right -- 10 just added enough FFXI elements and coop across the Internet.
Nintendo is your best hope. I think they will come through. At least for DQVII. I don't care about X that much.
I'd be absolutely gobsmacked if we got X. DQ7 is still possible. I really hope somehow we end up with DQM's remakes, but again, gobsmacked if it happens.
If Square Enix Japan wasn't being so xenophobic with X, we'd likely already have a fan translation of the PC version's UI at the very least. As it stands, who is going to bother working on a project like that when if they detect you're a dirty barbarian on their nice clean servers they ban you, or if you try to put up Youtube DQX Lets Plays they try to get your account shut down?