Biggest thing I see a problem with is the last one. Capital gains tax being lower encourages capital investment. It's a double edge sword.
As far as the healthcare cost thing, it's a savings for the vast majority, might be a slight burden on the top 5%.
Single income or household though, to me there is a big difference between two folks both having to work together to make 250K vs 1 single 250K earner....if its the latter in that individual is over 250K then I'd agree, not much of an impact, but if its household income then that sucks.
And again who is to say companies will take the money they are paying for health plans and transfer that back to employees, I could see companies just keeping that using the claim that it is going to the new government fees meaning employee salaries stay the same but now they have to pay more in taxes...for those with high deductible plans then sure, but for others with good plans they may lose out.