Hi George,
Funny answer: eXperts are only on the comments sections, there are lots of them. Real experts are rather humble.
Real answer: if you don't have skills to rebuild mobile menu, you have to find alternative mobile menu on Joomla Extension Directory (JED) and use it instead of default one from Helix. Yes, I have seen that some users used them also on our forum, and I used it as well, at least twice. They are commercial products mostly.
Question: is the current offcanvas menu really so annoying to customers that you feel the need to change it. Your design feelings are not always those of the vistors.