I don't know about bitcoin but i know that the halving is bad for miners. Miners are first who welcome to deny halving. But halving is good for traders and people who holding coins for price increase i think.
if the price goes up high enough after the block rewards have been decreased to 12.5btc, then the miners won't complain at all. if the price stays at current price level, then still the large mining farms can make profit. it will be the smaller miners that will feel the pain if the price doesn't go up much. these miners will most likely leave temporarily. they will come back once the price goes up again.