In all honesty, the vastly improved treatment of the DQ fanbase can possibly bolster sales for their other products. When you treat a large sum of people like outcasts simply because they are not your biggest group, your reputation will suffer. Let's pretend there were only 100,000 DQ fans in the US (though in reality likely far more)- that's 100,000 more people bringing down your reputation in addition to the larger fanbases being pissed at you. Its the snowball effect.
If you need to sell 10,000,000 copies to break even, you don't want people you essentially abused possibly costing you the sale of,let's pick a random number and say, 500,000 copies. That 5% loss could easily break you.
Making nice with us was wise. Let's say every DQ fan now pays heed to the company and finds more titles they like. Would you like to sell several hundred thounsand more copies of various non-DQ products? Would you like those people to do a little word of mouth with their friends?
SE finally learned the following:
1) You can't piss off your big fan bases with crappy quality. DQ aside, the FF14 fiasco and such really burned their core American fanbase.
2) Thanks to the Phil Rogers blog essentially blowing up in their face with no sheep coming out to play, they learned their consumers are not fools. They were expecting sheeple to type FF and KH so they could act like heroes. 85% of the posts were angry DQ fans.
3) Don't blame a series for not selling well when your own ineptitude of marketing is to blame.
4) Your company will gain more respect by putting out quality for all fans. If you only seek to sell mega-multi-million hits, your board of directors likely suffers from narcissistic personality disorder. At the rate SE was going, employee insurance rates were bound to skyrocket due to a dire need of mind altering prescriptions and mandated group therapy sessions.
Bottom line: be reasonable with DQ, don't drop another half-assed FF game, and remember that the KH folks are not ignorant children just because they like a game with Disney characters.