AutoDJ Transition Effects

Hello . I'm planing to work on transition effects for autoDJ , mainly focusing on High BPM to Low BPM and the reverse ,transitions . Im scannig other softwares and forums to get a list of a few but generic set of effects I can add. Hence I wanted to get eveyones views on some questions .

* What transition effects would you like to have in autoDJ the most . I'll prioritise my efforts based on everyones opinion .( Also the scope of autodetection of a suitable transiotion effects by autoDJ )

* How do you like the UI interface for manual selection of transition effects to look like .This includes the display of the current transion selected and the options to select/change effects as well. ( A brief discription will be all I need or a reference to other software )

Is there anything being developed in this area or anything I should look at. I know of an advanced_autoDJ_2 which attempts to add transition effects : daschuer/mixxx/tree/advanced_autodj_2