1 : New macro is awesome : Please more macro, like a second line of them ! (8 more basicly)
2 : A gui for Xrni when in tracker view : When double click, a small gui open with macros showing up (Like if it was a vst)
3 : Ability to make presets for xrni : Those could also be present in the gui said before
4 : Ability to choose sample played within the modulation tab
5 : And of course (Even tho it has been said to much times 
) : Ability to choose Start + End point from loop section played from sample.
This feature already exists. It saves files with the xrni extension 
(Simply leave the samples out before you save)
Click specific sample, if necessary adjust keyzone area, then click the radio button of the (test) modulation/fx set you want to pull it through. Play sample.