Mining OS it's about control & convenience. Not about profitability.
Hive OS only, love them OS, they added quite convenient mobile app recently.

If we are talkinkg about pool:
Nicehash:
higher than other pool fees
Slow payout rate (really a byproduct of using BTC and to help mitigate TX fees)
Nonsense with their own wallet vs real wallet (but easily can just mine directly to a real wallet)
Maybe not the most friendly to the smaller coins (as a ton of hash can be turned on them quickly)

On NiceHash I was expecting $0.57/day which is barely above profitability.  
On Hiveon Pool, I'm getting over 3 times that.