I don't know why people are crying due to snapdragon 835. Normally in this price you should receive SoC for medium range phones almost without GPU. 835 is maybe 2 years old but it is a flagship SoC, which is better than actual medium range SoC from this year.

I think 835 is a lot better choice than actual equivalent of 821.

Also, We should remember about work and effort to make a slider mechanism in these days. I'm sure that was over 80% of development costs.