Replying to Is the Fs700 worth keeping?

I just recently bought a Fs700r early this summer and I love everything I've shot with it so far. The avchd is kinda a bitch to deal with but nothing too bad. The main reason I bought it was for 1080 240fps and the built in NDs (which are hella helpful) but it's kind of a pain in the ass to lug around, and it's a bitch and a half to fly on my glidecam. I'm debating whether I should just keep it, or if I should sell it and get a used A7s/A7sii or a a6000 series with a speedbooster. I want to get an A7s but 3/5 of my lenses are apsc and I don't really want to sell them and get the ff equivalents. I mostly shoot motocross/skiing/ and a few music videos here and there. Let me know what you guys think I should do, cuz I'm hella torn rn