Their honesty kind of makes me want to support them. Better than the typical 'It's not just a port because the PC version will have special features such as support for multiple resolutions and optional mouse controls!' that we hear from other publishers. And maybe supporting this small effort will encourage larger efforts in the future. Honestly, did anyone expect anything better from a Japanese developer? Even Square Enix's Final Fantasy MMO's are best played with a gamepad.
Besides, it's the only way I'll ever end up playing it.