I'm extremely disappointed by the decision to drop the Key+ control from the track controls panel. (Not sure what version change did that. At the tail end of the dreadful Gibson era, I found the jump from 8.6 to X3 to be a waste of time and money -- sadly, after I did it -- so, I stuck to 8.6 and then I essentially moved from 8.6 to CWBL.)
The Key+ feature made raising/lowering pitch of a MIDI track far quicker and more straightforward than the multi-step transpose function. Sure, if you have a whole bunch of tracks, it makes sense to perform a grouped operation.
But if you simply have an already-tracked MIDI track you'd like to experiment and find a good key for, whoever removed the Key+ control made it a BIG PAIN IN THE BACKSIDE.