I use equations all the time in my documents. Would it be possible to support Mathtype (http://www.dessci.com/en/products/mathtype) insude Libreoffice? The Math GUI is much easier to use than the one that comes natively with Libreoffice.
Alternatively, is there any plan to make the GUI more useable with Libreoffice Math? The output is really nice but it’s hard to enter equations manually using the markup language and the GUI is not very good.
You can use MathType as OLE. If you want a 1-click call similar to LibreOffice’s own equation editor, that is possible via a macro. Ask for it, in case you want to go that way. You can use the 30-day trial version of MathType. When it expires, a “Lite” version remains, which is similar to the equation editor which came with Word 97 or is used in Kingsoft.
If you think the GUI of LibreOffice Math is difficult, you might not know all its features. I use the command window because it allows a much faster input than using templates. There exists a lot of templates and examples in the left pane. Do you have tried it in a current version of LibreOffice? Do you know, that you can click and double-click into the equation, to immediately change the selected part, without going to the command window? Find more details about the equation editor in https://wiki.documentfoundation.org/images/2/26/MG44-MathGuide.pdf
In addition, you might try the experimental new GUI. To get it, you have to enable Tools > LibreOffice > Advanced > Enable experimental features.