Time Signature Changes
This has not been implemented into Prime yet. We don't have an immediate date on when this would be added, but it is still something we hope to add in the future.
Ryan, I have found a work around that helps in some of the situations you mention. (And devs, please do not patch this until you have an official way of doing it!)
If a song has both 2/4 and 4/4 sections, upload the song as 2/4. As you set your edit points, it will let you do it every 2 beats instead of 4 beats, so you can set the points for 2/4 and 4/4. After you have finished all of your markers, save it and then delete the song from your device. Log into the loopcommunity website, go to your cloud storage, and click edit for the song you just set the marks for and change it from 2/4 to 4/4. Now, redownload the song onto your ipad/mac and the cues will be in 4/4, but the location markers will remain where you put them in 2/4. For those songs, turn off the click accent, and the click and cues will work perfect for the song.
I hope this hack works for you (and hopefully continues to work) until an official feature is released.
You can also do the same for 6/8 tracks. Upload it as 3/4, set your edit marks, delete it, change the time signature to 6/8, redownload it, and turn off the click accent. This will work with any 6/8 songs that also have 3/8, 9/8, or 12/8 measures.
Unfortunately, not yet. Hopefully this is something that we can add to the app in the near future! Sorry for the inconvenience, but let us know if there is anything else we can do to assist in the meantime!