Dear Renoise team,
don’t know whether U would interest, but just for sure…and since there is opportunity with new beta…
I’ve tried to use rns as live stage looper (hope U know what it means…). There are few “minor” issues with this that makes live looping impossible and by changing rns features a bit, you can turn rns into incredible machine such as Korg kaosspad KP3 or BOSS loop station and so one 
but with unlimited possibilities that rest of rns offers (because there is always some “but” with HW loopers).
first, if there would be possible to record to sampler from “track” and not from some “virtual” input, one can record send track or master track (any track) and create nice overdubs. One can also put line-in device into track and effect would be same as it works now.
lets use recording with sync start&stop with pattern for following explanation.
once new sample is recorded, it always resets loop type in instrument to none and worse, if you want to synchronize recording with track length and you want to trigger recorded instrument at pattern start (by putting note on at start of pattern track), you get only silence for first run after record end and you get sound after second pattern “round”. Note on is simply ignored after record end event.
There are few options how to handle this: either leave instrument sample play even when sample is replaced with new sample (and when it is note on and playing) because sample size is same. Or don’t forget to play first note on in track immediately after record end. Anyway I think that instrument loop type should remain same after recording new sample. One can also click note on immediately after record end but this will fail because currently instrument loop type is reset, so new loop is played only once. And also there might be time delay between record end and note on events.
also would be nice to have sample record and edit “undo” as key (clear last overdub)
when looping and recording, one usually needs to save couple of “phrases” and then jump between them. Currently rns supports jump to first and last pattern in pattern sequencer. If there would be possible to jump to #1, #2, #3,… track pattern it would be great.
no visual controls, just shortcut key.
different phrases can have different length and can play different instruments with different loop/sample length, so once U jump to phrase #2, U have to change instrument to #8 for example, but this wouldn’t be problem I think.
also, when sampler recording is on run, one can’t jump between track patterns now. Switch to pattern editor is necessary then jump and then back to record,… takes to much time. If recording will remain active when pattern editor is active,… would be nice (means make record on and off global shortcut). Or CC mapping to record on off ?
also missing so much tempo tap button. if you click such “button” the interval between your clicks is used to set song BPM. And also tempo up and tempo down function on key would be nice. There is no necessary to create any visual control for this (eg. button), only key assignment or CC would be enough.
if you will find something mentioned above as useful I will appreciate it. I think that turning tracker into looper and combine both would be nice idea.