I'm not sure what your interpretation of what Stoner said is, but from the press releases / quotes, he didn't say that much about it in reality. He thought it was better than he assumed it would be and with some small modifications believed it would be competitive. But with what? We don't know from that whether he meant as an Open bike against the other Open bikes, or competitive enough to fight for podiums.
From what I see, Honda have given Dorna what they wanted, a grid filler. None of the true Open bikes, the 'home brew specials', even with their fuel and tyre concessions are anywhere near the prototypes. Hayden is by far the quickest of the non-prototypes, a second ahead of the next one. So Honda have produced an 'Open winner' in the spirit it was asked for.
The Forward bikes may be racing as Open but they are full prototypes, so you can't compare the RCVR to them. If anyone, it's Yamaha who have messed up not Honda, as Espargaro could give their factory and satellite teams some real problems this year, just by putting it on the front row with the soft tyre. May not finish on the podium but his positioning in the first few laps could properly interfere with Lorenzo and co. But it's no inconeivable that he could take points from the prototypes on occassion.
Realistically, Honda couldn't ethically sell a bike for 1m euros that will equal or out perform the bikes it leases to its satellite teams for 3m. It's a grid filler the same as the true Open bikes are, aka CRT. If, after 2016 when there is only one claas again, Dorna ban things like pneumatic valves, electronic clutches, seamless gearboxes etc. then a bike like the RCVR may well be the future of Motogp and the privateer teams may once again have a chance of competing for podiums.
As it stands, all we'll see in 2016 is what we have now, prototypes with control ECU (Forward) still way ahead of the privateers.