I used locale remulator ( like locale emulator for 64 bits app, emulate japan system for just a specific exe). And the game was much more responsive in the 1.3.1 ( for example before i needed to spam "n" a couple a time to make the clothing menu appear, using remulator it's was instantaneus).
But i don't know if it's related, in this version the game run at a low resolution (I'm using a 1440p monitor too). I don't know if perhaps you changed the way the system settings are stored in the 1.4 or if remulator messed up something. Cause now, using or not remulator the game runs at a low res.
Even going back to the 1.3.1, now the game launchs at a low res.
For me half animations dont have sound and voice, some broken or button "S" not trigger animation.
About resolution low, game create folder "MyNewGame" with TermineSettings.xml on root disc.
Open in notepad and change
<?xml version="1.0"?>
<Settings xmlns:xsd="
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" xmlns:xsi="
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">
<screenWidth>1920</screenWidth>
<screenHeight>1080</screenHeight>
<screenMode>1</screenMode>
<qualityLevel>2</qualityLevel>
</Settings>