If you’d like to continue using your FP3, I would recommend a factory reset. That will get rid of lots of clutter and should restore performance. You must back up all your data and settings first, and I would recommend you make a list of the apps you will want to reinstall afterwards.
Otherwise, yes I can recommend the FP5. The main camera has two lenses, one wide-angle. As Alain says, you can see some results here.
I’ve had it since October and I’m very happy with it.