Just let David @ LSP know and he'll put it on his list. It really helps if you can provide him YOUR sequence so that he has a test sequence to use ... and as Dmoore said ... a video showing how to reproduce is key.
Vixen, while amazing and free ... really isn't really much of an RGB option as LSP 2.0 is. Even using LOR S3 ... it takes me forever to save and do certain things ... with just a single 4096 pixelnet universe. I find that LOR S3 + xlights is the best option for me this year, but man I wish LOR could do what LSP can ... it can't.
The software is still catching up to the technology, IMHO ... so regardless of what software your using ... a big dose of patience and tolerance is required.
My heart goes out to you, as I've been suffering with LSP also ... but I feel that LSP is the closest to where we need to be in the future, so its success is critical to all of us.