Would it be great?

It's easy to say "wouldn't it be great if life were always easy?"
It's a question, but not a rhetorical one: the answer does not appear to be simple. There are obvious advantages to life always being easy, but there are some drawbacks, too.

One must question what really leads to happiness. This is a question that has occupied philosophers for millennia. One answer, given by writers like Abrham Maslow, suggests that we are made happy through growth and learning.

If this is true, then adversity is the necessary concomitant of growth: without adversity, without a challenge, there is no possible growth to accomplish that which you could not have accomplished earlier.

So it doesn't seem to make sense to wish for a life of constant ease.
Instead, wouldn't it be great if life provided just enough challenge that we continue to grow, without so much challenge that our lives fall apart.