thank you very much for bringing them ontop and searching and collecting them!
i have thinked the laste whole nights if its maybe possible to insert the magic single switch to make the new instrument window worklfow usable.
first we have to find out what is wrong currently in worklow.
what i think:
-the distance between normal edit (cursor) position and important buttons is way to far, (mousekilometers)
-lost focus of the really often needed functions (remember the moved away and back rendertosample command^^)
example: why i have to go often in the sample settings? for me its the volume and the hullcurve.
solution for better workflow in THAT specific thing:
1.step from above link
2.autofocus or autojump with mousepointer to the volume/panning/finetune section of the sample (merge old mousepos^^)
3.bring back the sliderbars for volume and panning (for finetune the stepper is perfect)
4.same key should now switch instrument/sample window ON/OFF (was already requested by another person).
-currently the sample slot and the sample browser is on my 2monitor setup to far away.
workflow should be: quick load a sample and test if this fit better in that setting where i always have
quick change the volume/pitch of the loaded sample, this is now in renoise 3.0 almost impossible without going crazy. maybe porting the whole discbrowser from right to left would help.
-pls bring back the DSP chain preset button in discbrowser, the “other” is …confusing
-sample hullcurve lfo window is way to small(almost not usable now) and in “detached, fullscreen” version way to big and focus steeling (remember, focus WAS edit tracks, then i just want to change a little bit the attack of the sample and all the mess begins : fullscreen information change (to sample window) first time,
clicking to editable hullcurve editor : fullscreen information change (to zoom window) second time. make the edit, done: fullscreen information change (to track window) third time
in 2.8 this all was done without the three fullscreen information changes. to be honest, i doesnt have a quick working solution, maybe that part is now broken by design, features > usability 
maybe “just” doubbling the mini hullcurve editor in size will help a bit.
i stop here and will maybe create from each problem a own topic so it can be discussed more, but i fear it will just spamm like the other new 100 threads/day the forum and wont be seen by the one who would take attention and implementing it (because i’m also a programmer and i know how much bugs are in 3.0 which are more important)