[BRX]

You are correct, it's not. It's not a tool but a music language that is really simple to learn (at least for the basics) and which is criminally unknown and unused by jazz and band musicians (or any other musicians than the Irish folk community really) and could and should very well be used for "pro purposes", especially with MS supporting it now, but also the available web applications (and some other apps, too).

You have to invest the time to get to know it (but that's the same for pro tools).

Unfortunatly is is absolutly not a pro tool for jazz or advanced bands...
I-Real is an "amateur" developpment, but structure and chords are more ralistics to create an arrangement.

And Chord Pro do not solve the main problem : you needs 2 to 4 sheets for a band : UT, Bb, Drum, Lyrics, etc...

[Swiss1000]

We're not going to learn another language, rest assured. And if Mobile Sheet wants to become a true group tool, it must emphasize the tools used. 
The partitions are well managed. Implementing a mask or table would be extremely useful.