Honestly, I think the only message this kind of position sends is, "this brand has no sales potential" whether that's the intent or not. I don't run out to by games in genres I'm not particularly taken with myself, but I think if people really want "true" DQ games coming over here, they'd do well to loosen up some. By swearing off iOS ports and Heroes and whatever else, you're probably not convincing people to just put regular old DQ out there; you're telling them the brand isn't even worth the trouble. You're drawing a line in the sand they never see.
I don't think old school Resident Evil fans were (too) thrilled that the title that best serves their tastes as of late is a remaster of a decade old game that was already a remake. But Capcom stated that was them trying to see if that kind of game still has it at market and the fanbase bit that bullet. That might pay off.
I don't think it's fair to expect them to just release this stuff. It's not the '90s anymore. If you go all or nothing, corporate suits that aren't invested in the particulars of these things will always pick nothing and move on. If you really think DQ has a future in the west, I think you should be open to compromise.
The funny thing is I didn't swear off the ios version, or Hero's at least not directly. I simply don't own own those systems and I'm not about to plop down hundreds of dollars to get an Iphone or a ps4 I don't need just to support one brand no matter how much I love it.
In any case using an Orange to judge how well an Apple will sell is just plain dumb. It'd be like them releasing a Dragon quest fps spinoff here to see how well it sells and if it failed deciding that suddenly people don't want the RPG version anymore.
And your right this isn't the 90's anymore. Look at the Tales series, Namco abandoned it for years in the west because it wasn't a huge multimillion seller but once they brought it back with more realistic expectations it became a stable series for them here.
If anyone should be willing to comprise it's Square enix themselves. Maybe Dragon quest will never be as big as it is in Japan here but it doesn't have to be successful.
They bottem line is that they are an company that became big on releasing rpgs that has decided to NOT release those rpgs here anymore. If they want to pick nothing and move on fine but don't be surprised when people like me do the same to them.