Well, as a former Filmora user, I have to say this: Filmora cannot in any way keep up with softwares like Premiere, Pinnacle Studios or Sony Vegas.
Filmora is great for newcomers, and works beyond well as a substitute for Movie Maker, no doubt about that. I make music videos though, and eventhough they are homemade, low-budget amateur productions, Filmora would NEVER be able to cut it. PiP works incredibly slow, split screen is nearly impossible to synchronize, there are no real color grading options (except for contrast adjustment), and filters are over-the-top and rarely adjustable...
I actually used to edit music videos with Filmora, so calling it unusable for editing is not really fair... But I got sick of lagging, waiting, imprecise sync and limited color grading options... So I had to change my software. If you make simple vlogging or gaming videos though, Filmora will probably be able to deliver what you need, but as soon as you need a software for anything just a bit more advanced, Filmora can't keep up.
I hope you can use this info!