I think the price cut is way too drastic. It hurts the early adopter , now you say that the 20 games make up for the 80$ lost by the early consumer. Yah possibly however I for one never planned on buying any of the games offered in the Ambassodor pack. I am very tight for cash unemployed and put the 3DS on my credit card. That 80$ could have really helped me out. So yeah I'm pretty livid that Nintendo cut the price by 80$. Now will I hold off on early adopting WiiU, no I don't think Nintendo will make the same mistake twice, they will launch WiiU at a reasonable price and I will have no problem buying it.
However I can see the price cut as part of a massive attack on Vita. The price cut and if Nintendo cuts the DS line permanently the Vita won't have a chance in hell. With all the games coming this fall/winter and a 80$ cheaper price tag with proper marketing Nintendo could deliver a crushing blow to Sony. Again Nintendo will need to play its cards right but they could definatly deliver a blow to Vita right out of the gate.
Also Nintendo needs to boost hardware numbers to satisfy investors. Investors don't seem to care that DS and Wii are bringing in tons of cash, both are seen as temporary. Nintendo needs to show investors that they have long term profitability. If the 3DS can be sold at 169.99$ and shifts nearly as many units or more units then DS it will help relieve investors, in turn buying them time to prepare WiiU's launch.
In the end I think the price cut was a good decision. I hate it but it was smart on Nintendo's behalf. I think Nintendo could have succeeded at the 250$ price point, they would have turned a healthy profit on each unit and while it would have been out sold by Vita or at least a tight race I think Nintendo could have pulled it off. However investors don't share that sentiment so the price cut should definatly help relieve concerned investors!