There must be a reason for the delay. It's better to have a delay than to have an update with flaws. I think everything will be fine in the end, we need to have faith that the team behind will give their best for everything to be great!
It's a good plan to invest in Ethereum, I am not sure about the timing only. The price is up for some time, and maybe it will drop, nobody can predict what will happen, in the same time it can rise more and set up new bottom.
anyway i am Holding ETH still and no care when it will Go far because i trust this one and can hold still up when the 4-5 digits reached lol.