I don't disagree, and the mirror lock has been on our "todo" list for a while (I did not know it was possible to change the Mode via software, so that's pretty cool!) It's obvious to see why BYEOS has them (as it's a dedicated Canon capture application). Unfortunately features that are specific to a single hardware manufacturer generally end up lower in the pile as opposed to features that benefit all SGP users (more automation, better framing tools, better focus metrics, etc)
We may get to it eventually, but I can't give you a guess as to when.
Thanks,
Jared