I am not really sure what you are saying in the post above, but if you are responding to my post, I was making general comments about making equipment upgrades to improve one's photography, and about price and performance variables between the top models and the lower tier models in any particular camera product line. I am not struggling with my E-M1 although I certainly recognize its limitations. I actually enjoy using it and find it mostly meets my needs. I think I would enjoy the features of the new camera, especially in regards to improvements in focus speed and tracking and I would like the increased battery life if that pans out. I also find the pro-capture feature interesting, though not necessarily underwater.
I am fortunate that I can afford the new camera and a new Nauticam housing (unless they go crazy with pricing) and I will probably upgrade because I would like to...not because I think it will make me a better photographer. If I get better results from the camera then great, if not, that is fine, too.
I am not surprised that your friends have not seen an improvement in their photography by upgrading to a newer camera. As I have said before, for most of us, the camera is not the weakest link in the chain. If you can't get the results you want from last year's model, it is unlikely you will get them with this year's model.