First of all it's so much they should as they could that I was pointing out, second of all dropping the price drastically would bring back support if they casual market returned in droves, the market Nintendo needs to stay profitable, third, it's not JUST third party support that will drop Nintendo themselves will stop investing in it if it's not profitable to do so, they CAN NOT afford to take another loss like they did, unlike Sony and MS they have nothing of value to sell off to hide losses, they can't bleed money forever and that's that they are doing right now. They also can not afford to drop the price but the market is demanding that hence why retailers are doing despite Nintendo doing it, that's a reality the machine is over priced for the market. Last, for godssakes Nintendo is NOT competing with MS or Sony anyways so those are not the types of games they will ever attract that segment of the market will never buy outdated hardware no matter WHAT fancy controller they give it, and even die hard Nintendo fans are losing interest because Nintendo themselves are losing interest. I doubt dropping the game pad will turn it into a Wii success but it could bring back a lot of the Wii Fit type of fans who are on a tight budget and won't buy a PS4 anyways. They could do N64 levels of sales and make a profit, Game Cube barely made a profit and so far Wii U is losing money and it's losing so much it offsets what the 3DS makes, that is not good business.
Also it really goes back to what you mean by 3rd party support, DUH the major cross platform games won't make it anymore, but they should have been able to for at least another year, you can't really believe that if Wii U was doing better being superior to PS3 it wouldn't at least be getting the SAME GAMES the PS3 is getting? Hell right now the Wii U has better games than PS4 but that is not stopping the best games from coming to last gen hardware right now so why is it stopping those SAME GAMES from coming to Wii U? SALES period.
I forgot to mention in that last part that the third party support that will come back would be the kind tailored for the Nintendo crowd anyways like what Wii had.