I wouldn't say it's easier or harder, but more time consuming. Obviously if drop rate remains the same, then people will be forced to either farm or spend a chunk of zeni on them. Having no downgrade period would lighten things up yes, but at the same time you're still at the RNG's mercy. It's a matter of perspective really.
ok we're getting somewhere. More time consuming you say? So what if you use those same 300 stones and instead of getting plus +9 at the worst, you have a decent chance to end up with +0. Which system is better? Considering you'd, in theory, spend the same amount of time or money to get those stones.
Edit: And I have a suggestion for your RNG comment as well soon.