You should work on finishing the one route you as the writer most enjoy. Once that's done you can then set Violet Memoir as a linear VN or continue with other routes. Either way this should make the burden of choice weigh less on you. Remember that whatever task you do it is a lot funner when you take it one piece at a time rather then trying to get everything done at once.
I've seen to many VN's fizzle out because they try to do EVERYTHING at once.