Olympus 100 - 400mm MFT lens

Is a Good Lens but Heavyish to carry around all day. I sold All my Canon gear to go lightweight so bought Om1 Mk2. now I bought the 100-400mm and find it heavy again especially when I carry all my lenses and two cameras. I Like the lens but still can NOT get a decent bird in flight. I do NOT want to use Pro Capture and take Umpteen images. I only ever took 3 images with my Canon 5D3 or 7D n 400 f5.6 lens and got at least two in the frame, sharp. Why they put in all those Settings to make it complicated beats me.
Is a Good lens when you get used to using it.
Is a Good lens when you get used to using it.