The report was not published formally, but it was "leaked", so it does not have any credits for the ideas contained in it.
Because of this, with few exceptions it is impossible to determine with certainty which parts of the report are original ideas of von Neumann and which parts are ideas that von Neumann might have learned during the discussions with the ENIAC team.
An example of an idea that certainly did not come from the ENIAC team was the proposal to use an iconoscope CRT as the main memory (which was implemented first in the British Manchester computers, so such a memory became known as a Williams-Kilburn tube). The ENIAC team had a different idea of what to use as a memory, i.e. delay lines taken from radars. Von Neumann replaced this suggestion with a CRT, because he thought that a random-access memory is better.
The von Neumann report had an exceptional importance because it defined with perfect clarity what a digital computer should be, which should be its structure and then provided a detailed description of how such a computer should be designed, which was good enough to enable anyone who read the report to build such a computer. This effect really happened, and a great number of teams at universities, government agencies, independent research centers like IAS and various companies, both in USA and in other countries, have built electronic computers in the following decade, exploring various design options.
There is no doubt that the clarity of the report is due to von Neumann and whichever were the ideas of the ENIAC team about a future computer, they were much more jumbled.
Because the ENIAC team did not publish their ideas (and they did not intend to, because they already wanted to monetize what they had learned about computers, by founding a private company), it does not really matter what they thought. The world has learned how to make general-purpose electronic computers from the von Neumann report.
ENIAC was a programmable computing automaton, but it was not a digital computer in the modern sense of the word, i.e. a digital system with 4 levels of closed positive-feedback loops (the complexity of a digital system is determined by the number of levels of nested positive-feedback loops, combinational logic has 0 levels, a memory has 1 level, an automaton has 2 levels, a processor has 3 levels and a computer has 4 levels; these are minimum numbers, as a real device may have more levels than strictly necessary, to achieve various advantages).
