A great VSTi form of Arkos should work like V2 system or 4Klang softsynth, RECORDING and SAVE the chiptune with the original tracker format.
A VSTi like Gwem did can be great too (to begin with), so you have in your DAW the very same chiptune in Arkos 2 after reading/converting the MIDI file. A bit useless with Maxymizer, it doesn't read MIDI file. You don't have your tune playing on a real Atari ST.
Why I think that Arkos 2 have it all yet, a simple VSTi would be enough for me, instead sampling the sound inside the tracker and use it inside the DAW with a sampler, it's a slower inaccurate process.
To me there's no reason the performances couldn't be the same under a DAW than a tracker, just the pattern system is lost. Maybe some people want to get rid of the quantization, interresting, but to me it goes to the wrong direction if it's not just an option. I don't really needed the note off, or very few, it depend of the nature of the sound and I can cut the note with another sound anyway. It's not that hard to organize the events and fake the chipsound limitations in a DAW. The main bonus I like to have is to be able to play a chord as preview even if it can't be fully recorded on just one channel (first note pressed should) like some old mod trackers.
I'm not sure how the same instrument will know it's channel at time. A MIDI code could do the trick, it shouldn't make the chiptune bigger, just it write the note with the right instrument in the right channel.
Then that VSTi should have everything that Arkos 2 have, just it doesn't have the pattern editor. MIDI have everything to be able to call that arpeggio and all the fx Arkos 2 have, modulation, pitch bend, expression, cc code... In the end, only the pattern system should be an advantage for the tracker and size of the chiptune. Perhaps it can be implemented, probably complex or it's a matter of an organisation with MIDI.