Not enjoying the new shift change. With long blocks, it's too easy for a large amount of work to fall off the payable list.
With the longer shifts, you weren't really missing out on anything - you got paid for your work. It certainly took longer to fill the full dance card, but the risk of unpaid work was quite low.
If you're a regular miner it has no impact on your average reward. Some shares will go unpaid in long blocks, but the shares that do get paid get more per share. The same amount of BTC goes out to miners in the end.