Absolutely.
It's a never-ending cycle.
2015 WAS a weak year in comparison to others, and 2016 may be worse. But it balances.
Novak's best years on HC were probably 2012 and 2013. But in those years Fed was close to where he was in 2015, and Nadal had a miracle HC year in 2013. The field was stronger then.
So if things are weaker right now (and they are), what about the years when there really was still a Big Three, with Murray still dangerous, and a young DelPo around. I would argue that in those years the field was unusually strong.
Fed and Sampras also had strong and weak years.
I say count up the slams, count up the titles, look at the stats, and then be fair.
Novak from 2011 on has the strongest stats on HCs in the last 25 years. They really are amazing. We all know about Nadal's stats on clay. And we know about Pete and Fed on grass.
It's really simple.
The rest is butthurt.