How to get super-tight MIDI playback?

Again I’m unable to reproduce this, using the same sequence in your attachment (or any other sequence of notes) all of my plugins with built-in arpeggiators have consistent playback. Steinberg, NI, Spectrasonics…

This is probably one of these things that can be fixed by changing one setting.

I’m not sure what you’re trying to accomplish by digging up years old quotes that are both out of context and off topic though.