Thank you very much for your interest in my problem. I also understand that I have an older MacBook that should be replaced as soon as possible for better performance.
My workflow is simple. I use Itunes as a container for my music files. I make the Playlists from the Dj software directly because I need to know the BPM and the harmonic key of the song. I use two software as needed. Djay Pro is Rekordbox to make USB stick for CDJs. After making a playlist with Rekordbox I transfer it to Itunes so it is also available for Djay Pro. With Djay Pro I realized that I cannot make a playlist and then if necessary transfer it to Itunes. For my workflow it is very limiting.
I also took a look at the link you pointed out to me about the beatgrid. I totally agree that I must have the ability to manually correct the beat grid on tracks that require it. I hope it is implemented on the next updates.
I have to congratulate on the analysis of the songs. I analyzed 70s dance songs with excellent results in terms of BPM and beatgrid.
I would also like to have a different color of the beat grid, like that of Rekordbox in 3Band.
Forgive me for too many words. Djay has always had excellent merits unlike other software and I’m sure it will improve more and more over time.