This is not a strength of the program but I have over 200 jazz tracks that I have created. In some cases the endings were ok and in other cases a few minutes of tweaking and experimenting solved the problems. If you want great jazz tracks there is no program that will come close to the tools you already have. Any poweful software has a learning curve - take the time to learn - you won't be disapointed. I play live jazz and I can tell you the first time a tune is played the endings are challenging and some times a train wreck even with fine live musicians.

Good luck! My 2 cents.